Download or read book ELECTRICAL DISCHARGE MACHINING PROCESS DESIGN FOR POST PROCESSING STAINLESS STEEL 316L ADDITIVELY MANUFACTURED PARTS written by Gregory Bicknell and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wire electrical discharge machining (EDM) is a non-traditional subtractive manufacturing process. This process works by bringing a charged wire in close proximity to a conductive workpiece. When the wire is close enough to the workpiece, an electrical arc forms between the wire and the workpiece. The electrical arc melts away material from the workpiece, and the wire continues moving through the workpiece, leaving behind a slit slightly wider than the width of the wire. Wire EDM is a high-precision process that can meet very tight tolerances and is employed in several industries including the aerospace and automotive industries. Recently, wire EDM has been used in the additive manufacturing (AM) industry for metal part post-processing and removal from build plates. While wire EDM is increasingly being used in the AM industry, very little research has been conducted on the wire EDM of additively manufactured parts. This thesis discusses three studies performed on the wire EDM of additively manufactured stainless-steel 316L parts. The first study is a comparison of wrought and AM stainless-steel 316L with respect to the wire EDM process. This research tested and optimized different wire EDM process parameters for the machinability of wrought and AM 316L. The second study explored the interaction between the wire EDM process and AM stainless-steel 316L lattice support structures. Selected EDM parameters were measured while machining the support structures, and optimal support structure designs were identified for AM part removal from build-plate via wire EDM. The final study explored the interaction between the wire EDM process and stainless-steel AM parts containing pockets of trapped, un-melted powder. This study optimized wire EDM process parameters for machining trapped powder pockets and outlined a potential explanation for the high incidence of wire breakage that occurs when machining through pockets of trapped powder.
Download or read book Post Processing Techniques for Metal Based Additive Manufacturing written by Hao Wang and published by CRC Press. This book was released on 2023-09-04 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shares insights on post-processing techniques adopted to achieve precision-grade surfaces of additive manufactured metals including material characterization techniques and the identified material properties. Post-processes are discussed from support structure removal and heat treatment to the material removal processes including hybrid manufacturing. Also discussed are case studies on unique applications of additive manufactured metals as an exemplary of the considerations taken during post-processing design and selection. Addresses the critical aspect of post-processing for metal additive manufacturing Provides systematic introduction of pertinent materials Demonstrates post-process technique selection with the enhanced understanding of material characterization methods and evaluation Includes in-depth validation of ultra-precision machining technology Reviews precision fabrication of industrial-grade titanium alloys, steels, and aluminium alloys, with additive manufacturing technology The book is aimed at researchers, professionals, and graduate students in advanced manufacturing, additive manufacturing, machining, and materials processing.
Download or read book Designing for Metal Additive Manufacturing written by Sai Nithin Reddy Kantareddy and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing (AM) offers unprecedented design freedom to produce complex designs in a single step. Laser-based powder bed fusion, in particular, is a promising metal AM process to fabricate complex metal parts that are otherwise difficult, costly, or impossible to manufacture using traditional means. Many techniques for lightweighting designs and improving part performance such as topology optimization, lattice structures, and part consolidation, often result in designs with complex features that can only be made with AM. Although AM is not necessarily constrained by this geometric complexity, it does require unsupported/overhanging features in the design to be structurally supported by additional structures that can be later removed by post-processing using various techniques such as hand tools, machining, wire EDM (Electrical Discharge Machining), etc. Depending on the complexity of the part, support structures can often be substantial, difficult to access, and complex in shape; therefore, removing the support structures may be very difficult and require multiple post-processing steps. As a result, overall manufacturing cost, material consumption, and manufacturing time may unnecessarily increase, making AM less economical than initially conceived. Additionally, the thermo-mechanical nature of the metal AM process induces residual stresses and distortions in the built parts. In-process distortions can lead to build failures, part curling and warping, and material waste. Therefore, many designs cannot be easily manufactured using AM or may actually cost more to produce with AM. Design for Additive Manufacturing (DfAM) can remedy these limitations. DfAM encompass a set of principles or guidelines based on theory and experience to help design parts to be manufactured easily with AM. Effective implementation of DfAM during the design phase can result in parts suitable for AM, which can be affordable to make and easier to produce. However, the strategies to implement DfAM principles are not generalized and vary from part to part, process to process, and material to material. These part-specific requirements may require modifications in the existing design workflow, and a single workflow may not be suitable for all the design cases. To understand some of these differences, this thesis focuses on investigating the design process for leveraging metal AM capabilities at different levels of design complexities by redesigning three industry relevant components for additive manufacturing. In each case, the design conceptualization, workflow, design tools, DfAM principles, and improvement in product performance are compared and contrasted. Based on these three cases, recommendations are made for improving the design tools, and ultimately for improving the design workflow to reduce the computation time and improve the information flow across the software platforms.
Download or read book Springer Handbook of Additive Manufacturing written by Eujin Pei and published by Springer Nature. This book was released on 2023-11-25 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Handbook is the ultimate definitive guide that covers key fundamentals and advanced applications for Additive Manufacturing. The Handbook has been structured into seven sections, comprising of a thorough Introduction to Additive Manufacturing; Design and Data; Processes; Materials; Post-processing, Testing and Inspection; Education and Training; and Applications and Case Study Examples. The general principles and functional relationships are described in each chapter and supplemented with industry use cases. The aim of this book is to help designers, engineers and manufacturers understand the state-of-the-art developments in the field of Additive Manufacturing. Although this book is primarily aimed at students and educators, it will appeal to researchers and industrial professionals working with technology users, machine or component manufacturers to help them make better decisions in the implementation of Additive Manufacturing and its applications.
Download or read book Design and Post Processing for Metal Additive Manufacturing written by Bartlomiej Wysocki and published by Mdpi AG. This book was released on 2024-01-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal additive manufacturing (AM) has gained significant attention due to its ability to produce functional, net-shape parts using laser, electron beam, or binder jetting methods in various industrial sectors. Recent advancements in AM have opened up new opportunities for design freedom and the fabrication of complex geometries such as cellular solids, metamaterials, or biomimetic materials that are not easily achievable using conventional methods. Today, these objects can be created using computer-aided design (CAD) models and elemental or alloyed metallic powders. This Special Issue of Materials, titled "Design and Post Processing for Metal Additive Manufacturing", sought submissions on the design of elements with predicted microstructure and mechanical properties, the use of artificial intelligence/machine learning (AI/ML) in AM, numerical algorithms for AM, and μ-CT magining for quality control. While AM's powder bed manufacturing provides the possibility of fabricating objects of any shape in one production step, it does come with some disadvantages. A major drawback is the need to generate support for the fabricated parts to dissipate the heat generated during the 3D printing process and minimize the geometrical distortions caused by internal stresses from metallic powders. This Special Issue also covers computer simulations and improved fabrication protocols that can help reduce these issues.
Download or read book Micromachining written by Zdravko Stanimirović and published by BoD – Books on Demand. This book was released on 2019-11-20 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: To present their work in the field of micromachining, researchers from distant parts of the world have joined their efforts and contributed their ideas according to their interest and engagement. Their articles will give you the opportunity to understand the concepts of micromachining of advanced materials. Surface texturing using pico- and femto-second laser micromachining is presented, as well as the silicon-based micromachining process for flexible electronics. You can learn about the CMOS compatible wet bulk micromachining process for MEMS applications and the physical process and plasma parameters in a radio frequency hybrid plasma system for thin-film production with ion assistance. Last but not least, study on the specific coefficient in the micromachining process and multiscale simulation of influence of surface defects on nanoindentation using quasi-continuum method provides us with an insight in modelling and the simulation of micromachining processes. The editors hope that this book will allow both professionals and readers not involved in the immediate field to understand and enjoy the topic.
Download or read book 3D Printing and Additive Manufacturing Technologies written by L. Jyothish Kumar and published by Springer. This book was released on 2018-06-07 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a selection of papers on advanced technologies for 3D printing and additive manufacturing, and demonstrates how these technologies have changed the face of direct, digital technologies for the rapid production of models, prototypes and patterns. Because of their wide range of applications, 3D printing and additive manufacturing technologies have sparked a powerful new industrial revolution in the field of manufacturing. The evolution of 3D printing and additive manufacturing technologies has changed design, engineering and manufacturing processes across such diverse industries as consumer products, aerospace, medical devices and automotive engineering. This book will help designers, R&D personnel, and practicing engineers grasp the latest developments in the field of 3D Printing and Additive Manufacturing.
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
Download or read book Additive Manufacturing written by Amit Bandyopadhyay and published by CRC Press. This book was released on 2015-09-08 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of additive manufacturing has seen explosive growth in recent years due largely in part to renewed interest from the manufacturing sector. Conceptually, additive manufacturing, or industrial 3D printing, is a way to build parts without using any part-specific tooling or dies from the computer-aided design (CAD) file of the part. Today, mo
Download or read book Transactions on Intelligent Welding Manufacturing written by Shanben Chen and published by Springer. This book was released on 2017-08-01 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary aim of this volume is to provide researchers and engineers from both academia and industry with up-to-date coverage of recent advances in the fields of robotic welding, intelligent systems and automation. It gathers selected papers from the 2017 International Workshop on Intelligentized Welding Manufacturing (IWIWM’2017), held June 23-26, 2017 in Shanghai, China. The contributions reveal how intelligentized welding manufacturing (IWM) is becoming an inescapable trend, just as intelligentized robotic welding is becoming a key technology. The volume is divided into four main parts: Intelligent Techniques for Robotic Welding, Sensing in Arc Welding Processing, Modeling and Intelligent Control of Welding Processing, and Intelligent Control and its Applications in Engineering.
Download or read book Additively Manufactured Inconel 718 written by Dunyong Deng and published by Linköping University Electronic Press. This book was released on 2018-01-24 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing (AM), also known as 3D printing, has gained significant interest in aerospace, energy, automotive and medical industries due to its capabilities of manufacturing components that are either prohibitively costly or impossible to manufacture by conventional processes. Among the various additive manufacturing processes for metallic components, electron beam melting (EBM) and selective laser melting (SLM) are two of the most widely used powder bed based processes, and have shown great potential for manufacturing high-end critical components, such as turbine blades and customized medical implants. The futures of the EBM and SLM are doubtlessly promising, but to fully realize their potentials there are still many challenges to overcome. Inconel 718 (IN718) is a nickel-base superalloy and has impressive combination of good mechanical properties and low cost. Though IN718 is being mostly used as a turbine disk material now, the initial introduction of IN718 was to overcome the poor weldability of superalloys in 1960s, since sluggish precipitation of strengthening phases ?’/?’’ enables good resistance to strain-age cracking during welding or post weld heat treatment. Given the similarity between AM and welding processes, IN718 has been widely applied to the metallic AM field to facilitate the understandings of process-microstructure-property relationships. The work presented in this licentiate thesis aims to better understand microstructures and mechanical properties EBM and SLM IN718, which have not been systematically investigated. Microstructures of EBM and SLM IN718 have been characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM) and correlated with the process conditions. Monotonic mechanical properties (e.g., Vickers microhardness and tensile properties) have also been measured and rationalized with regards to the microstructure evolutions before and after heat treatments. For EBM IN718, the results show the microstructure is not homogeneous but dependant on the location in the components, and the anisotropic mechanical properties are probably attributed to alignment of porosities rather than texture. Post heat treatment can slightly increase the mechanical strength compared to the as-manufactured condition but does not alter the anisotropy. SLM IN718 shows significantly different microstructure and mechanical properties to EBM IN718. The as-manufactured SLM IN718 has very fine dendritic microstructure and Laves phases in the interdendrites, and is “work-hardened” by the residual strains and dislocations present in the material. Mechanical properties are different between horizontally and vertically built samples, and heat treatment can minimize this difference. Results from this licentiate thesis provide the basis for the further research on the cyclic mechanical properties of EBM and SLM IN718, which would be the focus of following phase of the Ph.D. research.
Download or read book Micro Nano Manufacturing written by André Zimmermann and published by MDPI. This book was released on 2019-09-03 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro manufacturing involves dealing with the fabrication of structures in the size range of 0.1 to 1000 µm. The scope of nano manufacturing extends the size range of manufactured features to even smaller length scales—below 100 nm. A strict borderline between micro and nano manufacturing can hardly be drawn, such that both domains are treated as complementary and mutually beneficial within a closely interconnected scientific community. Both micro and nano manufacturing can be considered as important enablers for high-end products. This Special Issue of Applied Sciences is dedicated to recent advances in research and development within the field of micro and nano manufacturing. The included papers report recent findings and advances in manufacturing technologies for producing products with micro and nano scale features and structures as well as applications underpinned by the advances in these technologies.
Download or read book Rapid Prototyping written by Patri K. Venuvinod and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the dawn of civilization, mankind has been engaged in the conception and manufacture of discrete products to serve the functional needs of local customers and the tools (technology) needed by other craftsmen. In fact, much of the progress in civilization can be attributed to progress in discrete product manufacture. The functionality of a discrete object depends on two entities: form, and material composition. For instance, the aesthetic appearance of a sculpture depends upon its form whereas its durability depends upon the material composition. An ideal manufacturing process is one that is able to automatically generate any form (freeform) in any material. However, unfortunately, most traditional manufacturing processes are severely constrained on all these counts. There are three basic ways of creating form: conservative, subtractive, and additive. In the first approach, we take a material and apply the needed forces to deform it to the required shape, without either adding or removing material, i. e. , we conserve material. Many industrial processes such as forging, casting, sheet metal forming and extrusion emulate this approach. A problem with many of these approaches is that they focus on form generation without explicitly providing any means for controlling material composition. In fact, even form is not created directly. They merely duplicate the external form embedded in external tooling such as dies and molds and the internal form embedded in cores, etc. Till recently, we have had to resort to the 'subtractive' approach to create the form of the tooling.
Download or read book Failure Analysis of Heat Treated Steel Components written by Lauralice de Campos Franceschini Canale and published by ASM International. This book was released on 2008 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Additive Manufacturing State of the Art 2020 written by Nader Asnafi and published by . This book was released on 2021 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Manufacturing (AM), more popularly known as 3D printing, is transforming the industry. AM of metal components with virtually no geometric limitations has enabled new product design options and opportunities, increased product performance, shorter cycle time in part production, total cost reduction, shortened lead time, improved material efficiency, more sustainable products and processes, full circularity in the economy, and new revenue streams. This Special Issue of Metals gives an up-to-date account of the state of the art in AM.
Download or read book Modeling and Optimization in Manufacturing written by Catalin I. Pruncu and published by John Wiley & Sons. This book was released on 2021-07-19 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the state-of-the-art in multiscale modeling and optimization in manufacturing from two leading voices in the field Modeling and Optimization in Manufacturing delivers a comprehensive approach to various manufacturing processes and shows readers how multiscale modeling and optimization processes help improve upon them. The book elaborates on the foundations and applications of computational modeling and optimization processes, as well as recent developments in the field. It offers discussions of manufacturing processes, including forming, machining, casting, joining, coating, and additive manufacturing, and how computer simulations have influenced their development. Examples for each category of manufacturing are provided in the text, and industrial applications are described for the reader. The distinguished authors also provide an insightful perspective on likely future trends and developments in manufacturing modeling and optimization, including the use of large materials databases and machine learning. Readers will also benefit from the inclusion of: A thorough introduction to the origins of manufacturing, the history of traditional and advanced manufacturing, and recent progress in manufacturing An exploration of advanced manufacturing and the environmental impact and significance of manufacturing Practical discussions of the economic importance of advanced manufacturing An examination of the sustainability of advanced manufacturing, and developing and future trends in manufacturing Perfect for materials scientists, mechanical engineers, and process engineers, Modeling and Optimization in Manufacturing will also earn a place in the libraries of engineering scientists in industries seeking a one-stop reference on multiscale modeling and optimization in manufacturing.
Download or read book Welding Metallurgy and Weldability written by John C. Lippold and published by John Wiley & Sons. This book was released on 2014-11-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure analysis is also provided, along with examples of SEM fractography that will aid in determining failure mechanisms. Welding Metallurgy and Weldability examines a number of weldability testing techniques that can be used to quantify susceptibility to various forms of weld cracking. Describes the mechanisms of weldability along with methods to improve weldability Includes an introduction to weldability testing and techniques, including strain-to-fracture and Varestraint tests Chapters are illustrated with practical examples based on 30 plus years of experience in the field Illustrating the weldability aspects of structural materials used in a wide variety of engineering structures, Welding Metallurgy and Weldability provides engineers and students with the information needed to understand the basic concepts of welding metallurgy and to interpret the failures in welded components.
