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Book Process Planning for Additive Manufacturing of Metallic Functionally Graded Materials

Download or read book Process Planning for Additive Manufacturing of Metallic Functionally Graded Materials written by Frederick Lia and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A decision making algorithm for process planning for laser-based directed energy deposition (DED) additive manufacturing (AM) to produce metallic functionally graded materials (FGM) components is proposed in this research. The challenge of processing and modeling the FGM component depends on the local compositions throughout the gradient and directly impact the microstructure development and material properties. The objective in utilizing the algorithm was to minimize the brittle intermetallic phases within the gradient transition regions of the FGM component, which could be caused by dilution effects occurring at the locations of the gradient transition regions during the laser deposition process. Two models were developed for the algorithm: an energy balance model and a dilution model. The energy balance model was a combination of an analytical method and empirical model, which predicted the dimensions of the deposit track, such as: melt pool width, deposit height, and melt pool penetration depth. The dilution model utilized the track dimensions from the energy balance model to predict the chemical compositions of the FGM gradients. Two FGM systems were explored to validate the developed models. A material system based on AISI stainless steel 316L (SS 316L) and nickel aluminum bronze (NAB) system was used to verify the consistency and accuracy of the energy balance model and the dilution model. The stainless steel alloy 316L and Inconel 625® FGM system was also used to demonstrate the capability of the models for producing FGM material with alloys having practical applications. The energy balance model relied on critical laser deposition process parameters, such as laser power, laser scan speed, and laser spot size; as well as material physical properties such as, thermal properties and two empirical variables: powder capture efficiency, Pe, and melt pool aspect ratio, r. This approach for the energy balance model was required to predict the FGM compositions as a function of processing parameters and condition, which would provide predictive capabilities quickly and less expensively as a control algorithm. The energy balance model was utilized to estimate deposit track dimensions and showed strong agreement with the experimentally measured results for the SS 316L and NAB FGM system. The dilution model successfully predicted the gradient compositions and showed correlation with electron diffraction spectroscopy (EDS) data obtained from measured track dimensions and the energy balance model predictions for track dimensions. The dilution model was also used to investigate the gradient transitions along the vertical and horizontal directions for both SS 316L and NAB FGM and SS 316L and Inconel 625® FGM systems, and this analysis indicated that the model was capable of accurately predicting concentrations within these regions.

Book Additive Manufacturing of Metal based Functionally Graded Materials

Download or read book Additive Manufacturing of Metal based Functionally Graded Materials written by Ashley Reichardt and published by . This book was released on 2017 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decade, critical advancements have allowed metal additive manufacturing to graduate from a mere prototyping tool to a full-scale manufacturing process. Substitution of load-bearing components with their lighter, stronger, and less expensive additively manufactured counterparts is already becoming commonplace in the aerospace, automotive, and energy industries. With qualification underway, research efforts can now be directed towards bringing the more revolutionary capabilities of additive manufacturing to fruition. One such area is the ability to incorporate multiple alloys within a single build to fabricate complex geometry functionally graded structures, thus eliminating the need for extraneous welds and joints. As it turns out, local tailoring of composition is within the means of commercial laser deposition systems. However, its implementation is wholeheartedly a materials problem, driven by the difficulty of establishing strong metallurgical bonds between incompatible alloys. This dissertation provides a comprehensive treatment of the subject, from initial consideration of its challenges, to the development of specific gradient components. Based on a review of advances in dissimilar metal welding and additive-based functional grading, a pragmatic approach is conceived of for developing individual gradients from start to finish. Incompatibilities between dissimilar alloys are generalized as brittle intermetallic formation, thermal property mismatch, and other metallurgical issues. Building upon the efforts of others, a series of strategies is then defined for exploiting the unique capabilities of additive manufacturing to overcome these. Among the most compelling is the use of multi-powder feeder laser deposition to carry out nonlinear paths in composition space that circumvent deleterious phases, as predicted by CALPHAD thermodynamic modeling. Also proposed is the elimination of sharp interfaces between alloys of mismatching properties using smooth compositional grading. Upon implementing these strategies in the course of this thesis, it quickly became clear that each gradient system still requires some level of independent development to address alloy-specific concerns. In response, an approach is introduced that makes use of both modeling and experimental efforts to iteratively improve upon a given gradient design. Prototype gradients are fabricated with laser deposition and subjected to microstructural characterization to identify the critical issues that impact the gradient’s integrity. Thermodynamic modeling efforts are then directed towards identifying design modifications to overcome these issues. The process is repeated until successful, repeatable gradients are achieved. The latter part of the thesis is dedicated to demonstrating this approach in two distinct experimental case studies, concerning the development of gradients from (1) titanium to stainless steel, and (2) maraging steel to austenitic stainless steel. In both cases, microstructural characterization proved to be instrumental in identifying the particular issues affecting the gradients, such that they could be addressed directly with modeling. For the case of joining titanium with steel, severe brittle intermetallic formation was identified as the primary cause of failure. Modeling was thus focused on predicting phase equilibria along the gradient, such to identify a nonlinear composition path free of intermetallic formation. The maraging to stainless steel gradients, by contrast, exhibited greater inherent chemical compatibility. Their development rather required close attention to the alloys’ impurity contents, hardening mechanisms, and microstructural features to determine a means of reducing undesirable secondary phases and defects. Critical analysis of the results for both gradients imparted a number of “lessons learned”, providing guidance for future development of this capability.

Book Laser Based Additive Manufacturing of Metal Parts

Download or read book Laser Based Additive Manufacturing of Metal Parts written by Linkan Bian and published by CRC Press. This book was released on 2017-08-09 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-Based Additive Manufacturing (LBAM) technologies, hailed by some as the "third industrial revolution," can increase product performance, while reducing time-to-market and manufacturing costs. This book is a comprehensive look at new technologies in LBAM of metal parts, covering topics such as mechanical properties, microstructural features, thermal behavior and solidification, process parameters, optimization and control, uncertainty quantification, and more. The book is aimed at addressing the needs of a diverse cross-section of engineers and professionals.

Book Additive Manufacturing of Metals  The Technology  Materials  Design and Production

Download or read book Additive Manufacturing of Metals The Technology Materials Design and Production written by Li Yang and published by Springer. This book was released on 2017-05-11 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a unique guide to the three-dimensional (3D) printing of metals. It covers various aspects of additive, subtractive, and joining processes used to form three-dimensional parts with applications ranging from prototyping to production. Examining a variety of manufacturing technologies and their ability to produce both prototypes and functional production-quality parts, the individual chapters address metal components and discuss some of the important research challenges associated with the use of these technologies. As well as exploring the latest technologies currently under development, the book features unique sections on electron beam melting technology, material lifting, and the importance this science has in the engineering context. Presenting unique real-life case studies from industry, this book is also the first to offer the perspective of engineers who work in the field of aerospace and transportation systems, and who design components and manufacturing networks. Written by the leading experts in this field at universities and in industry, it provides a comprehensive textbook for students and an invaluable guide for practitioners

Book Additive Manufacturing with Metals

Download or read book Additive Manufacturing with Metals written by Sanjay Joshi and published by Springer Nature. This book was released on 2023-12-29 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook and reference provides a comprehensive treatment of additive manufacturing (AM) for metals, including design and digital work flows, process science and reliability, metallic systems, quality assurance, and applications. The book is rooted in the fundamental science necessary to develop and understand AM technologies, as well as the application of engineering principles covering several disciplines to successfully exploit this important technology. As additive manufacturing of metals is the fastest growing subset of this transformative technology, with the potential to make the widest impact to industrial production, Metals Additive Manufacturing: Design, Processes, Materials, Quality Assurance, and Applications is ideal for students in a range of engineering disciplines and practitioners working in aerospace, automotive, medical device manufacturing industries.

Book Additive Manufacturing of Metal Alloys 1

Download or read book Additive Manufacturing of Metal Alloys 1 written by Patrice Peyre and published by John Wiley & Sons. This book was released on 2022-08-11 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decade or so, additive manufacturing has revolutionized design and manufacturing methods by allowing more freedom in design and functionalities unattainable with conventional processes. This has generated extraordinarily high interest in both industrial and academic communities. Additive Manufacturing of Metal Alloys 1 puts forward a state of the art of additive manufacturing and its different processes, from metallic raw materials (in the form of powder or wire) to their properties after elaboration. It analyzes the physics and the modelling of existing AM processes as well as future elaboration processes. Using a balanced approach encapsulating basic notions and more advanced aspects for each theme, this book acts as a metal additive manufacturing textbook, as useful to professionals in the field as to the general public.

Book Additive Manufacturing

Download or read book Additive Manufacturing written by Pulak Mohan Pandey and published by CRC Press. This book was released on 2023-02-06 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The text explores the development, use, and effect of additive manufacturing and digital manufacturing technologies for diverse applications. It will serve as an ideal reference text for graduate students and academic researchers in diverse engineering fields including industrial, manufacturing, and materials science. This book: Discusses the application of 3D virtual models to lasers, electron beams, and computer-controlled additive manufacturing machines Covers applications of additive manufacturing in diverse areas including healthcare, electronics engineering, and production engineering Explains the use of additive manufacturing for biocomposites and functionally graded materials Highlights rapid manufacturing of metallic components using 3D printing Illustrates production and optimization of dental crowns using additive manufacturing This book covers recent developments in manufacturing technology, such as additive manufacturing, 3D printing, rapid prototyping, production process operations, and manufacturing sustainability. The text further emphasizes the use of additive manufacturing for biocomposites and functionally graded materials. It will serve as an ideal reference text for graduate students and academic researchers in the fields of industrial engineering, manufacturing engineering, automotive engineering, aerospace engineering, and materials science.

Book Solid State Metal Additive Manufacturing

Download or read book Solid State Metal Additive Manufacturing written by Hang Z. Yu and published by John Wiley & Sons. This book was released on 2024-07-10 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timely summary of state-of-the-art solid-state metal 3D printing technologies, focusing on fundamental processing science and industrial applications Solid-State Metal Additive Manufacturing: Physics, Processes, Mechanical Properties, and Applications provides detailed and in-depth discussion on different solid-state metal additive manufacturing processes and applications, presenting associated methods, mechanisms and models, and unique benefits, as well as a detailed comparison to traditional fusion-based metal additive manufacturing. The text begins with a high-level overview of solid-state metal additive manufacturing with an emphasis on its position within the metal additive manufacturing spectrum and its potential for meeting specific demands in the aerospace, automotive, and defense industries. Next, each of the four categories of solid-state additive technologies—cold spray additive manufacturing, additive friction stir deposition, ultrasonic additive manufacturing, and sintering-based processes—is discussed in depth, reviewing advances in processing science, metallurgical science, and innovative applications. Finally, the future direction of these solid-state processes, especially the material innovation and artificial intelligence aspects, are discussed. Sample topics covered in Solid-State Metal Additive Manufacturing include: Physical processes and bonding mechanisms in impact-induced bonding and microstructures and microstructural evolution in cold sprayed materials Process fundamentals, dynamic microstructure evolution, and potential industrial applications of additive friction stir deposition Microstructural and mechanical characterization and industrial applications of ultrasonic additive manufacturing Principles of solid-state sintering, binder jetting-based metal printing, and sintering-based metal additive manufacturing methods for magnetic materials Critical issues inherent to melting and solidification, such as porosity, high residual stress, cast microstructure, anisotropic mechanical properties, and hot cracking Solid-State Metal Additive Manufacturing is an essential reference on the subject for academic researchers in materials science, mechanical, and biomedicine, as well as professional engineers in various manufacturing industries, especially those involved in building new additive technologies.

Book Additive Manufacturing of High performance Metals and Alloys

Download or read book Additive Manufacturing of High performance Metals and Alloys written by Igor Shishkovsky and published by BoD – Books on Demand. This book was released on 2018-07-11 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freedoms in material choice based on combinatorial design, different directions of process optimization, and computational tools are a significant advantage of additive manufacturing technology. The combination of additive and information technologies enables rapid prototyping and rapid manufacturing models on the design stage, thereby significantly accelerating the design cycle in mechanical engineering. Modern and high-demand powder bed fusion and directed energy deposition methods allow obtaining functional complex shapes and functionally graded structures. Until now, the experimental parametric analysis remains as the main method during AM optimization. Therefore, an additional goal of this book is to introduce readers to new modeling and material's optimization approaches in the rapidly changing world of additive manufacturing of high-performance metals and alloys.

Book Italian Manufacturing Association Conference

Download or read book Italian Manufacturing Association Conference written by Luigi Maria Galantucci and published by Materials Research Forum LLC. This book was released on 2023-10-15 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents new advances in the field of manufacturing technologies. It focuses on the design and engineering of manufacturing processes; additive manufacturing and reverse engineering; assembly, disassembly and circular processes; system simulation, optimization and digital manufacturing; and materials processing technology. Keywords: Human Robot, Short Term Production Planning, Thermoplastic Composite Components, Compostable Materials, Diffusion Bonding, Superplastic Forming, Hardening Technologies, Physical Simulation Tests, Numerical Model, Dissimilar Material Welding, Additive Manufacturing, Laser Powder Bed Fusion, Fused Deposition Modeling, Laser Sintering, Fused Filament Fabrication, Manufacturing System Laser Welding, Wind Blades, Bandsaw Machine, PVC Tubes, Submerged Arc Welding, Multi-Layered Coatings, Cryogenics, Metal Piercing, Picosecond Laser Processing, Carbon Nanotube; Fiber Reinforced Composites, Tools With Complex Geometry. Carbon/Epoxy Composite, Rheological Additives, PP/flax Fibers, Human Well-being, Extruded Rods & Pipes, Laser Welding, E-mobility, WAAM Process, Glass Fiber.

Book Laser Metal Deposition Process of Metals  Alloys  and Composite Materials

Download or read book Laser Metal Deposition Process of Metals Alloys and Composite Materials written by Rasheedat Modupe Mahamood and published by Springer. This book was released on 2017-09-05 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the industrial potential and explains the physics behind laser metal deposition (LMD) technology. It describes the laser metal deposition (LMD) process with the help of numerous diagrams and photographs of real-world process situations, ranging from the fabrication of parts to the repair of existing products, and includes case studies from current research in this field. Consumer demand is moving away from standardized products to customized ones, and to remain competitive manufacturers require manufacturing processes that are flexible and able to meet consumer demand at low cost and on schedule. Laser metal deposition (LMD) is a promising alternative manufacturing process in this context. This book enables researchers and professionals in industry gain a better understanding of the LMD process, which they can then use in real-world applications. It also helps spur on further innovations.

Book Manufacturing Techniques for Materials

Download or read book Manufacturing Techniques for Materials written by T.S. Srivatsan and published by CRC Press. This book was released on 2018-04-09 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing Techniques for Materials: Engineering and Engineered provides a cohesive and comprehensive overview of the following: (i) prevailing and emerging trends, (ii) emerging developments and related technology, and (iii) potential for the commercialization of techniques specific to manufacturing of materials. The first half of the book provides the interested reader with detailed chapters specific to the manufacturing of emerging materials, such as additive manufacturing, with a valued emphasis on the science, technology, and potentially viable practices specific to the manufacturing technique used. This section also attempts to discuss in a lucid and easily understandable manner the specific advantages and limitations of each technique and goes on to highlight all of the potentially viable and emerging technological applications. The second half of this archival volume focuses on a wide spectrum of conventional techniques currently available and being used in the manufacturing of both materials and resultant products. Manufacturing Techniques for Materials is an invaluable tool for a cross-section of readers including engineers, researchers, technologists, students at both the graduate level and undergraduate level, and even entrepreneurs.

Book Additive Manufacturing of Metals

Download or read book Additive Manufacturing of Metals written by Leila Ladani and published by . This book was released on 2020-08 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a technical introduction to additive manufacturing (AM) with a focus on powder bed fusion and metals. It provides the theory and industry-based practices to design, make, and test metal components via AM. After outlining the methods and materials of powder bed methods, the book explains the workings and physical limitations of electron beam and laser melt technologies in manufacturing parts, using a variety of metal powders. In this context, the physics of powder melting is described, as well as the effects of temperature variables on the properties of a part. The critical elements of how powder feedstock is chosen and formulated are explained. Processing methods are described using original design and engineering parameters developed by the author. Information is provided on current test methods of metals produced by AM, as well as how to carry out quality control, monitor reliability, and implement safety standards. For process design, a section is devoted to modeling.Each chapter includes a set of problems for students and practitioners that reflect metals' fabrication in industry.

Book Additive Manufacturing of Functionally Graded Materials Between Ferritic and Austenitic Alloys

Download or read book Additive Manufacturing of Functionally Graded Materials Between Ferritic and Austenitic Alloys written by James Scott Zuback and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferritic steels and austenitic alloys are used extensively as structural materials in power generation facilities such as fossil-fired and nuclear power plants. Currently, these alloys are joined using common fusion welding processes. However, dissimilar metal welds between ferritic and austenitic alloys are susceptible to premature failure due to a variety of simultaneously operating metallurgical issues, including carbon migration, localized creep strain, and coefficient of thermal expansion mismatch. Although improvements have been made to alloy selection and weld design over the past few decades, the root causes that ultimately lead to failure persist. As many of the power plants responsible for the worldwide production of electricity have exceeded or are nearing their designed lifetimes, an engineering solution that directly addresses the underlying metallurgical challenges is of great interest.Dissimilar metal welds between ferritic and austenitic alloys are an attractive application for the design of a functionally graded material system capable of preventing premature failure. Functionally graded materials represent a class of advanced materials designed to achieve a function by locally controlling density, composition, or microstructure to engineer site-specific properties. Problems arising from abrupt changes in chemical composition, microstructure, and properties in dissimilar welds can be overcome by implementing a functionally graded material that gradually transitions from a ferritic steel to an austenitic alloy. Additive manufacturing is well-suited for the design and fabrication of spatially dependent material combinations to achieve specific functions by grading chemical composition in a layer by layer manner.Carbon migration in dissimilar metal welds between ferritic and austenitic materials has been identified as a major cause for poor creep performance and premature failures in nuclear applications. Steep composition gradients and abrupt microstructural changes result in a large thermodynamic driving force that facilitates carbon diffusion away from the ferritic material, leading to negative impacts on creep strength. An appropriately graded transition joint effectively reduces the driving force for carbon diffusion by lowering the carbon chemical potential gradient. Theoretical calculations show that negligible amounts of carbon diffusion occur under typical service conditions in a functionally graded material between 2.25Cr-1Mo steel and Alloy 800H compared to its dissimilar weld counterpart. The functionally graded material fabricated using laser-based directed energy deposition was then experimentally tested for its effectiveness in reducing carbon diffusion and was shown to significantly outperform the dissimilar weld. Microstructural characterization indicated that a full composition gradient from 2.25Cr-1Mo steel and Alloy 800H may not be necessary, and a shorter transition joint will suffice. When the microstructure becomes fully austenitic, there is little change in microhardness and further compositional grading provides no benefits in reducing carbon diffusion. Additionally, a soft zone formed at the beginning of the functionally graded material near the ferritic steel, leading to an abrupt change in properties. If this region is excluded from the functionally graded material, however, the designed function of the transition joint for reducing carbon diffusion is negatively impacted. This finding indicates that tradeoffs between the function and unexpected microstructure exist during the design and fabrication of functionally graded materials. Lack of fusion defects, which are detrimental to properties and performance, formed in specific regions of the functionally graded material. The formation of defects was traced to changes in molten pool geometry due to variations in chemical composition. The presence of minor alloying elements changes the activity of surface-active elements, namely oxygen, in discrete regions throughout the functionally graded material. The thermodynamic activities of surface-active elements significantly impact the magnitude and direction of liquid metal flow during processing due to surface tension driven effects. The simulated molten pool geometries were found to be deep and narrow for compositions close to the ferritic steel and become shallower and wider as composition is graded towards the austenitic alloy. To avoid lack of fusion defects, process parameters such as laser power or hatch spacing may need to be adjusted in-situ to account for the variations in molten pool geometry.Changes in chemical composition during compositional grading can lead to the formation of unexpected secondary phases that can significantly alter mechanical properties and sometimes lead to build failures. The precipitate morphology in additively manufactured nickel base superalloys with slight changes in chemical composition was investigated with the goal of establishing connections between chemical composition and precipitate type. Although the as-deposited alloys exhibited similar precipitate distributions, the differences in precipitate type and morphology were striking. Variations in minor alloying elements were found to be an important driver for secondary phase formation in both the as-deposited and hot isostatic pressed conditions.

Book Inkjet Based 3D Additive Manufacturing of Metals

Download or read book Inkjet Based 3D Additive Manufacturing of Metals written by Mojtaba Salehi and published by Materials Research Forum LLC. This book was released on 2018-01-02 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Manufacturing (AM) is a highly promising rapid manufacturing process. Based on incremental layer-upon-layer deposits, three dimensional components of high geometrical complexity can be produced; applications ranging from aerospace and automotive to biomedical industries. Laser, electron beam and wire-based techniques are reviewed. Particular emphasis is placed on 3D inkjet printing of metals, which is reviewed here in great depth and for the first time. This is an ambient temperature technology which offers some unique advantages for printing metals and alloys, as well as composite and functionally graded materials. Material selection guidelines are presented and the various deposition techniques and post-printing treatments are discussed; together with the resulting properties of the printed components: Density, shrinkage, resolution and surface roughness, porosity-related and mechanical properties, as well as biological properties The various metal printing techniques are compared with each other and case studies are referred to. Additive Manufacturing, Inkjet Printing of Metals, 3D Printed Components, Laser Melting, Laser Sintering, Laser Powder Deposition, Material Selection Guidelines for Inkjet Printing of Metals, Biological Properties of AM Metals, Surface Properties of AM Metals, Porosity of AM Metals, Shrinkage of AM Metals, Mechanical of Properties of AM Metals, Density of Properties of AM Metals

Book Metal Powder Based Additive Manufacturing

Download or read book Metal Powder Based Additive Manufacturing written by Kun Zhou and published by John Wiley & Sons. This book was released on 2023-05-17 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Powder—Based Additive Manufacturing Highly comprehensive resource covering all key aspects of the current developments of metal powder—based additive manufacturing Metal Powder—Based Additive Manufacturing provides valuable knowledge and critical insights regarding the recent advances in various metal powder—based additive manufacturing techniques. This book also reviews typical powder preparation processes and highlights the significance of metal powder—based additive manufacturing for various industrial applications. The key features covered in this book: A rigorous overview of the underlying theories and practical applications of metal powder—based additive manufacturing techniques, including laser powder bed fusion, electron beam melting, laser-based directed energy deposition, and metal binder jetting. An expansive introduction of each technique and its significance pertaining to the printing processes, metallurgical defects, powder materials, equipment, and the microstructures and mechanical properties of the printed parts. A deep exploration of the preparation processes of metal powders for additive manufacturing and the effects of different processes on the powder properties. Comprehensive case studies of parts printed by metal powder—based additive manufacturing for various industrial applications. By providing extensive coverage of relevant concepts in the field of metal powder—based additive manufacturing, this book highlights its essential role in Industry 4.0 and serves as a valuable resource for scientists, engineers, and students in materials science, powder metallurgy, physics, and chemistry. The rich research experience of the authors in additive manufacturing ensures that the readers are provided with both an in-depth understanding and informative technical guidance of metal powder—based additive manufacturing.

Book Materials Technology Gaps in Metal Additive Manufacturing

Download or read book Materials Technology Gaps in Metal Additive Manufacturing written by Cynthia Waters and published by SAE International. This book was released on 2018-04-24 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal additive manufacturing (MAM) is an exciting emergent technology that offers the possibility of democratizing metal manufacturing worldwide. Many believe it has the ability to revolutionize product manufacturing on a global scale. MAM will require a considerable design shift for manufacturers and, hence, will disrupt conventional thinking and require adaptation. Visionaries in the mobility industry can see the transformative possibilities after materials considerations are addressed./ Materials Technology Gaps in Metal Additive Manufacturing introduces the reader to various opportunities and relationships in the study of material technologies involved in metal-based additive manufacturing of aerospace and automotive parts. Everything starts and ends with the material feedstock, and the intermediate processes that affect a particular metal. Each of the choices in the complex integrated MAM system impacts final-part properties. Edited by Dr. Cynthia K. Waters, from North Carolina A&T State University, Materials Technology Gaps in Metal Additive Manufacturing is a highly curated collection of 10 seminal SAE International papers. They discuss the various technologies involved in MAM, and draw attention to the materials needs in each of the situations addressed. The main topics included in Materials Technology Gaps in Metal Additive Manufacturing are: Process design and material modeling Metal powder selection and study Additive processing parameters' effect on materials properties As more interdependencies of material properties and possible manufacturing processes evolve (compatibility interdependence), questions if the specific manufacturing process is capable to create the required geometry will also arise. Materials Technology Gaps in Metal Additive Manufacturing brings innovative ways to address these and other challenges that are always present in the adoption of novel technologies.