Download or read book Investigation of Microstructure and Mechanical Properties by Direct Metal Deposition written by Jingwei Zhang and published by . This book was released on 2018 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Microstructure and properties of Direct Metal Deposition (DMD) parts are very crucial to meeting industrial requirements of parts quality. Prediction, and control of microstructure and mechanical properties have attracted much attention during conventional metal manufacturing process under different conditions. However, there is few investigations focused on microstructure simulation and mechanical properties control under different process parameters during DMD process. This dissertation is intended to develop a multiscale model to investigate Ti6Al4V grain structure development and explore Ti6Al4V based functionally graded material (FGM) deposit properties during DMD process. The first research topic is to investigate and develop a cellular automaton-finite element (CA-FE) coupled model to combine with thermal history and simulate nucleation sites, grain growth orientation and rate, epitaxial growth of new grains, remelting of preexisting grains, metal addition, and grain competitive growth. The second research topic is to develop grain growth algorithm, which is appropriate for highly non-uniform temperature field and high cooling rate, to control grain structure under real-time changing process parameters. The third research topic is to investigate the influence of process parameters on microstructure and properties of Ti6Al4V-based FGMs, which are fabricated with different TiC volume fraction from 0 to 30vol%. The microstructure, Vickers hardness, phase identification, tensile properties of FGM are measured to investigate the fabricated FGM qualities. The Digital Image Correlation (DIC) is developed to analyze Young's modulus versus composition of FGM parts"--Abstract, page iv.

Download or read book Mechanical Properties and Microstructure Study for Direct Metal Deposition of Titanium Alloy and Tool Steel written by Yaxin Bao and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis is focused on the research about DMD (Direct Metal Deposition) which is an additive manufacturing process and used in various engineering applications such as producing fully dense and net shape productions in difficult-to-machine materials. In this study, the microstructure was analyzed through optical microscopy and some mechanical properties were tested with different equipments such as SEM (Scanning Electron Microscopy) and micro-hardness tester ... In summary, this thesis validated that DMD process can be improved through surface treatments and is capable of repairing molds for die casting industry"--Introduction, leaf 1

Download or read book Mechanical Properties and Microstructure Study for Direct Metal Deposition of 316L Stainless Steel written by Tian Fu and published by . This book was released on 2010 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Direct metal deposition or laser cladding is a process capable of producing fully dense and net shape metal products and this process could be used on coating metal components in various engineering applications. This process has fast heating and cooling rates which can improve the surface hardness and provide excellent adhesion through metallurgical bond between coating material and substrate. This paper evaluated the laser deposited 316L stainless steel coating on 4340 steel, which is widely used for aircraft landing gear applications. The microstructure, micro-hardness and quantitative EDS were explored to verify the coating properties. The desired homogeneous microstructure and high micro-hardness for 316L stainless steel coating are obtained. In this study, single layer 316L stainless steel deposits have been evaluated. The relationship between laser deposition process parameters and coating hardness has been studied resulting in an understanding of the effect of parameters and an empirical model has been developed. The influence of shield gas and composition of the deposition and dilution zone has been investigated. The microstructures and composition analyses were evaluated by Energy Dispersive X-ray (EDX) analysis and Optical Microscopy. Homogeneous microstructure which is required for landing gear coatings has been obtained. The deposition microhardness has been evaluated using a microhardness tester. The microhardness varies from 280HV to 520HV"--Abstract, leaf iv.

Download or read book Additive Manufacturing of Titanium Alloys written by Bhaskar Dutta and published by Butterworth-Heinemann. This book was released on 2016-06-17 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Manufacturing of Titanium Alloys: State of the Art, Challenges and Opportunities provides alternative methods to the conventional approach for the fabrication of the majority of titanium components produced via the cast and wrought technique, a process which involves a considerable amount of expensive machining. In contrast, the Additive Manufacturing (AM) approach allows very close to final part configuration to be directly fabricated minimizing machining cost, while achieving mechanical properties at least at cast and wrought levels. In addition, the book offers the benefit of significant savings through better material utilization for parts with high buy-to-fly ratios (ratio of initial stock mass to final part mass before and after manufacturing). As titanium additive manufacturing has attracted considerable attention from both academicians and technologists, and has already led to many applications in aerospace and terrestrial systems, as well as in the medical industry, this book explores the unique shape making capabilities and attractive mechanical properties which make titanium an ideal material for the additive manufacturing industry. - Includes coverage of the fundamentals of microstructural evolution in titanium alloys - Introduces readers to the various Additive Manufacturing Technologies, such as Powder Bed Fusion (PBF) and Directed Energy Deposition (DED) - Looks at the future of Titanium Additive Manufacturing - Provides a complete review of the science, technology, and applications of Titanium Additive Manufacturing (AM)

Download or read book Investigation of Effect of Process Parameters on Multilayer Builds by Direct Metal Deposition written by Tarak Amine and published by . This book was released on 2015 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Multilayer direct laser deposition (DLD) is a fabrication process through which parts are fabricated by creating a molten pool into which metal powder is injected as. During fabrication, complex thermal activity occurs in different regions of the build; for example, newly deposited layers will reheat previously deposited layers. The objective of this study was to provide insight into the thermal activity that occurs during the DLD process. This work focused on the effect of the deposition parameters of deposited layers on the microstructure and mechanical properties of the previously deposited layers. Varying the parameters was shown to produce different effects on the microstructure morphology and property values, presumably resulting from in-situ quench and tempering. A commercial ABAQUS/CAE software was used to model this process by developing a thermo-mechanical 3D finite element model. This work presents a 3D heat transfer model that considers the continuous addition of mass in front of a moving laser beam using ABAQUS/CAE software. The model assumes the deposit geometry appropriate to each experimental condition and calculates the temperature distribution, cooling rates and re-melted layer depth, which can affect the final microstructure. Model simulations were qualitatively compared with experimental results acquired in situ using a K-type thermocouple. Moreover, the work focused on the effect of cooling rate and other processing variables on microstructure and mechanical properties. The influence of the cooling rate on the microstructure and mechanical properties was investigated. The differed cooling rate led to varied grain size and resulted in affected varied hardness and tensile strength."--Abstract, page iv.

Download or read book Welding Metallurgy and Weldability of Nickel Base Alloys written by John C. Lippold and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most up-to-date coverage of welding metallurgy aspects and weldability issues associated with Ni-base alloys Welding Metallurgy and Weldability of Nickel-Base Alloys describes the fundamental metallurgical principles that control the microstructure and properties of welded Ni-base alloys. It serves as a practical how-to guide that enables engineers to select the proper alloys, filler metals, heat treatments, and welding conditions to ensure that failures are avoided during fabrication and service. Chapter coverage includes: Alloying additions, phase diagrams, and phase stability Solid-solution strengthened Ni-base alloys Precipitation strengthened Ni-base alloys Oxide dispersion strengthened alloys and nickel aluminides Repair welding of Ni-base alloys Dissimilar welding Weldability testing High-chromium alloys used in nuclear power applications With its excellent balance between the fundamentals and practical problem solving, the book serves as an ideal reference for scientists, engineers, and technicians, as well as a textbook for undergraduate and graduate courses in welding metallurgy.

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.

Download or read book Proceedings of the Scientific Practical Conference Research and Development 2016 written by K. V. Anisimov and published by Springer. This book was released on 2017-12-04 with total page 715 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book relates to the III Annual Conference hosted by The Ministry of Education and Science of the Russian Federation in December 2016. This event has summarized, analyzed and discussed the interim results, academic outputs and scientific achievements of the Russian Federal Targeted Programme “Research and Development in Priority Areas of Development of the Russian Scientific and Technological Complex for 2014–2020.” It contains 75 selected papers from 6 areas considered priority by the Federal Targeted Programme: computer science, ecology & environment sciences; energy and energy efficiency; lifesciences; nanoscience & nanotechnology and transport & communications. The chapters report the results of the 3-years research projects supported by the Programme and finalized in 2016.

Download or read book Proceedings of the 8th International Symposium on Superalloy 718 and Derivatives written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2014-12-02 with total page 951 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Additive Manufacturing and in Situ Mechanical and Material Characterization of Metallic Structures at Micro nanoscale written by Seyed Soheil Daryadel and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress in microscale additive manufacturing (μ-AM) of metals requires engineering of the microstructure for various functional applications. In situ control over the microstructure during three-dimensional (3D) printing is critical to achieve metallic nanostructures with desired properties and eliminate the need for post-processing. In this dissertation, an ambient environment localized pulsed electrodeposition (L-PED) process for direct printing of 3D free-standing and layer-by-layer nanotwinned (nt) metals is introduced. 3D nt-Cu structures were additively manufactured using pulsed electrodeposition at the tip of an electrolyte containing nozzle. For the first time, the control of the microstructure of metals during 3D-printing is reported. In particular, It is shown that through variation of electrochemical process parameters the density and the orientation of the coherent twin boundaries (CTBs), as well as the grain size can be controlled. Ntmetals offer superior mechanical (high ductility and strength) and electrical properties (low electromigration) compared to their nanocrystalline (nc) counterparts. While these properties are advantageous for applications in nanoscale devices, the fabrication of nt-metals has been limited to 2D films or template-based 1D geometries. The focused ion beam (FIB) and transmission electron microscopy (TEM) analysis showed that the printed metal was fully dense, mostly devoid of impurities and microstructural defects, and confirmed the formation of CTBs. Mechanical properties of the 3D printed nt-Cu were characterized by in situ SEM micro-compression experiments. The 3D printed nt-Cu exhibited average flow stress of 960 MPa, which is remarkable for a 3D printed material. The microstructure and mechanical properties of the nt-Cu was compared to nc-Cu printed using the same process under direct current (DC) voltage. The results show that such control over microstructure directly correlates with the mechanical properties of the printed metal. L-PED is introduced as an approach to enable direct deposition of nano-pillars and micro-pillars of metals and alloys. When combined with in situ nanomechanics instrumentation, this approach may enable high-throughput investigation of the process–microstructure–property relationship, in particular for nanocrystalline and nano-twinned metals. The application for 3D printed electronics will be greatly extended when they can be used in extreme environments and especially at elevated temperatures. Therefore, the thermal stability and reliability of the additively manufactured nt-Cu interconnects is investigated. The results show clear correlation between the microstructure and the thermal stability of the printed metal. The microstructures with columnar shaped grains and high density of low-energy CTBs exhibited better thermal stability compared to the ones with high-angle random-oriented grain boundaries. Despite the evolution of microstructure and growth of the grains, printed materials with high density of TBs exhibited high strength of 522 MPa after annealing for 4 hours at 300 °C. Additionally, LED is extended to a larger scale process for patterning of high quality metallic patterns on flexible and nonconductive substrates. The printed metallic patterns are solid with no porosity and impurities, and exhibit high electrical conductivity. Overall, the results indicate the feasibility of using LED 3D-printed high conductivity nt-metal features in a wide range of applications, particularly for the electronics and the next generation integrated circuits.

Download or read book Welding Metallurgy written by Sindo Kou and published by John Wiley & Sons. This book was released on 2003-03-31 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated to include new technological advancements in welding Uses illustrations and diagrams to explain metallurgical phenomena Features exercises and examples An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.

Download or read book Advances in Metal Additive Manufacturing written by Sachin Salunkhe and published by Elsevier. This book was released on 2022-10-10 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Metal Additive Manufacturing explains fundamental information and the latest research on new technologies, including powder bed fusion, direct energy deposition using high energy beams, and hybrid additive and subtractive methods. This book introduces readers to the technology, provides everything needed to understand how the different stages work together, and inspires to think beyond traditional metal processing to capture new ideas in metal. Chapters offer an introduction on metal additive manufacturing, processes, and properties and standards and then present surveys on the most significant international advances in metal additive manufacturing. Throughout, the book presents a focus on the effect of important process parameters on the microstructure, mechanical properties and wear behavior of additively manufactured parts. - Covers the entire process chain of metal additive manufacturing, from input data preparation to part certification - Describes a wide range of the latest design tools and options, including generative design, topology optimization, and lattice and surface optimization - Addresses additive manufacturing, with a comprehensive list of metals including titanium, aluminum, iron-and nickel-based alloys and Inconel 718

Download or read book Additive and Subtractive Manufacturing written by J. Paulo Davim and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-01-20 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing (AM) and subtractive manufacturing (SM) offer numerous advantages in the production of single and multiple components. They provide incomparable design independence and are used to fabricate products in several industries, e.g.: aeronautic, automotive, biomedical, etc. The book presents recent results of processes including 3D printing, SLS (selective laser sintering), EBM (electron beam melting) and Precise Cutting and Drilling.

Download or read book Laser Cladding written by Ehsan Toyserkani and published by CRC Press. This book was released on 2004-08-12 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capitalizing on the rapid growth and reduced costs of laser systems, laser cladding is gaining momentum, and in some instances replacing conventional techniques of depositing thin films because it can accommodate a great variety of materials, achieve uniform thickness and precise widths of layers, and provide improved resistance to wear and corrosion in the final product. Laser cladding technology also offers a revolutionary layered manufacturing and prototyping technique that can fabricate complex components without intermediate steps. Laser Cladding reviews the parameters, techniques and equipment, process modeling and control, and the physical metallurgy of alloying and solidification during laser cladding. The authors clarify the interconnections laser cladding has with CAD/CAM design; automation and robotics; sensors, feedback, and control; physics, material science, heat transfer, fluid dynamics, and powder metallurgy to promote further development and improved process quality of this growing technology. As the first book entirely dedicated to the topic, it also offers a history of its development and a guide to applications and market opportunities. While a considerable part of Laser Cladding is dedicated to industrial applications, this volume brings together valuable information illustrated with real case studies based on the authors' vast experience, and research and analysis in the field to provide a timely source for both academia and industry.

Download or read book Proceedings of the 9th International Conference on Industrial Engineering written by Andrey A. Radionov and published by Springer Nature. This book was released on 2023-08-28 with total page 849 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent findings in industrial, manufacturing and mechanical engineering and provides an overview of the state of the art in these fields, mainly in Russia and Eastern Europe. A broad range of topics and issues in modern engineering is discussed, including the machinery and mechanism design, dynamics of machines and working processes, friction, wear and lubrication in machines, design and manufacturing engineering of industrial facilities, transport and technological machines, mechanical treatment of materials, industrial hydraulic systems. This book gathers selected papers presented at the 9th International Conference on Industrial Engineering (ICIE), held in Sochi, Russia, in May 2023. The authors are experts in various fields of engineering, and all papers have been carefully reviewed. Given its scope, this book will be of interest to a wide readership, including mechanical and production engineers, lecturers in engineering disciplines, and engineering graduates.

Download or read book Additive Friction Stir Deposition written by Hang Z. Yu and published by Elsevier. This book was released on 2022-07-19 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Friction Stir Deposition is a comprehensive summary of the state-of-the-art understanding on this emerging solid-state additive manufacturing technology. Sections cover additive friction stir deposition, encompassing advances in processing science, metallurgical science and innovative applications. The book presents a clear description of underlying physical phenomena, shows how the process determines the printing quality, covers resultant microstructure and properties in the as-printed state, highlights its key capabilities and limitations, and explores niche applications in repair, cladding and multi-material 3D printing. Serving as an educational and research guide, this book aims to provide a holistic picture of additive friction stir deposition-based solid-state additive manufacturing as well as a thorough comparison to conventional beam-based metal additive manufacturing, such as powder bed fusion and directed energy deposition. - Provides a clear process description of additive friction stir deposition and highlights key capabilities - Summarizes the current research and application of additive friction stir deposition, including material flow, microstructure evolution, repair and dissimilar material cladding - Discusses future applications and areas of research for this technology

Download or read book Practical Guidelines for the Fabrication of Duplex Stainless Steels written by International Molybdenum Association and published by . This book was released on 2009 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: