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Author: Suveen Nigel Mathaudhu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Bulk metallic glasses (BMGs) have displayed impressive mechanical properties, but the use and dimensions of material have been limited due to critical cooling rate requirements and low ductility. The application of severe plastic deformation by equal channel angular extrusion (ECAE) for consolidation of bulk amorphous metals (BAM)and amorphous metal matrix composites (AMMC) is investigated in this dissertation. The objectives of this research are a) to better understand processing parameters which promote bonding between particles and b) to determine by what mechanisms the plasticity is enhanced in bulk amorphous metal matrix composites consolidated by ECAE. To accomplish the objectives BAM and AMMCs were produced via ECAEconsolidation of Vitreloy 106a (Zr5.5Nb2. Cu15.6Ni12.8Al10.3-wt%), ARLloy #1 (Hf--1.3Cu16.2Ni--.6Ti2.2Al2.6-wt%), and both of these amorphous alloys blended with crystalline phases of W, Cu and Ni. Novel instrumented extrusions and a host of post processing material characterizations were used to evaluate processing conditions and material properties. The results show that ECAE consolidation at temperatures within the supercooled liquid region gives near fully dense (>99%) and well bonded millimeter scale BAM and AMMCs. The mechanical properties of the ECAE processed BMG are comparable to cast material: [sigma]f = 1640 MPa, [epsilon]f = 2.3%, E = 80 GPa for consolidated Vitreloy 106a as compared to [sigma]f = 1800 MPa, [epsilon]f = 2.5%, E = 85 GPa for cast Vitreloy106, and [sigma]f = 1660 MPa, [epsilon]f = 2.0%, E = 97 GPa for ARLloy #1 as compared to [sigma]f = 2150 MPa, [epsilon]f
Author: Suveen Nigel Mathaudhu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Bulk metallic glasses (BMGs) have displayed impressive mechanical properties, but the use and dimensions of material have been limited due to critical cooling rate requirements and low ductility. The application of severe plastic deformation by equal channel angular extrusion (ECAE) for consolidation of bulk amorphous metals (BAM)and amorphous metal matrix composites (AMMC) is investigated in this dissertation. The objectives of this research are a) to better understand processing parameters which promote bonding between particles and b) to determine by what mechanisms the plasticity is enhanced in bulk amorphous metal matrix composites consolidated by ECAE. To accomplish the objectives BAM and AMMCs were produced via ECAEconsolidation of Vitreloy 106a (Zr5.5Nb2. Cu15.6Ni12.8Al10.3-wt%), ARLloy #1 (Hf--1.3Cu16.2Ni--.6Ti2.2Al2.6-wt%), and both of these amorphous alloys blended with crystalline phases of W, Cu and Ni. Novel instrumented extrusions and a host of post processing material characterizations were used to evaluate processing conditions and material properties. The results show that ECAE consolidation at temperatures within the supercooled liquid region gives near fully dense (>99%) and well bonded millimeter scale BAM and AMMCs. The mechanical properties of the ECAE processed BMG are comparable to cast material: [sigma]f = 1640 MPa, [epsilon]f = 2.3%, E = 80 GPa for consolidated Vitreloy 106a as compared to [sigma]f = 1800 MPa, [epsilon]f = 2.5%, E = 85 GPa for cast Vitreloy106, and [sigma]f = 1660 MPa, [epsilon]f = 2.0%, E = 97 GPa for ARLloy #1 as compared to [sigma]f = 2150 MPa, [epsilon]f
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
This is the Final Progress Report for an ARO research program extending over a period of 3 years. The program was designed to evaluate the processing of materials using the procedure of Equal-Channel Angular Pressing (ECAP) in which a coarse-grained bulk solid is subjected to severe, but controlled, plastic deformation. Two metal matrix composites were investigated in detail: an aluminum 2009 alloy reinforced with 25% SiC particulates and an aluminum 6061 alloy reinforced with 10% alumina particulates. The results demonstrate the potential for achieving high strength and excellent mechanical properties in these two composites. Additional collaborations were established with other leading groups in the field and this led to many new insights in the field of ECAP processing. All of these new developments are described in detail in the publications arising from this program.
Author: C. Suryanarayana
Publisher: CRC Press
ISBN: 1498763685
Category : Technology & Engineering
Languages : en
Pages : 543
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Book Description
Reflecting the fast pace of research in the field, the Second Edition of Bulk Metallic Glasses has been thoroughly updated and remains essential reading on the subject. It incorporates major advances in glass forming ability, corrosion behavior, and mechanical properties. Several of the newly proposed criteria to predict the glass-forming ability of alloys have been discussed. All other areas covered in this book have been updated, with special emphasis on topics where significant advances have occurred. These include processing of hierarchical surface structures and synthesis of nanophase composites using the chemical behavior of bulk metallic glasses and the development of novel bulk metallic glasses with high-strength and high-ductility and superelastic behavior. New topics such as high-entropy bulk metallic glasses, nanoporous alloys, novel nanocrystalline alloys, and soft magnetic glassy alloys with high saturation magnetization have also been discussed. Novel applications, such as metallic glassy screw bolts, surface coatings, hyperthermia glasses, ultra-thin mirrors and pressure sensors, mobile phone casing, and degradable biomedical materials, are described. Authored by the world’s foremost experts on bulk metallic glasses, this new edition endures as an indispensable reference and continues to be a one-stop resource on all aspects of bulk metallic glasses.
Author: M. Sherif El-Eskandarany
Publisher: Elsevier
ISBN: 0323221289
Category : Technology & Engineering
Languages : en
Pages : 350
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Book Description
This book is a detailed introduction to mechanical alloying, offering guidelines on the necessary equipment and facilities needed to carry out the process and giving a fundamental background to the reactions taking place. El-Eskandarany, a leading authority on mechanical alloying, discusses the mechanism of powder consolidations using different powder compaction processes. A new chapter will also be included on thermal, mechanically-induced and electrical discharge-assisted mechanical milling. Fully updated to cover recent developments in the field, this second edition also introduces new and emerging applications for mechanical alloying, including the fabrication of carbon nanotubes, surface protective coating and hydrogen storage technology. El-Eskandarany discusses the latest research into these applications, and provides engineers and scientists with the information they need to implement these developments. The industrial applications of nanocrystalline and metallic glassy powders are presented. The book also contains over 200 tables and graphs to illustrate the milling processes and present the properties and characteristics of the resulting materials. - Guides readers through each step of the mechanical alloying process, covering best practice techniques and offering guidelines on the required equipment - Tables and graphs are used to explain the stages of the milling processes and provide an understanding of the properties and characteristics of the resulting materials - A comprehensive update on the previous edition, including new chapters to cover new applications
Author: Michael J. Zehetbauer
Publisher: John Wiley & Sons
ISBN: 3527604944
Category : Technology & Engineering
Languages : en
Pages : 872
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Book Description
These proceedings of the "Second International Conference on Nanomaterials by Severe Plastic Deformation" review the enormous scientific avalanche that has been developing in the field over recent years. A valuable resource for any scientist and engineer working in this emerging field of nanotechnology.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 854
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Book Description
Author: Shuo Yin
Publisher: Springer Nature
ISBN: 303073367X
Category : Technology & Engineering
Languages : en
Pages : 190
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Book Description
This book systematically describes the status quo and future development of cold spray additive manufacturing technology. It starts with a comprehensive introduction to the fundamentals of cold spray additive manufacturing, including its history, working principle, equipment, processing parameters and powder feedstock. It then discusses the fundamentals of and the latest developments in the gas flow character, particle acceleration, particle deposition and bond mechanism from the perspectives of both experiments and modelling to provide readers with insights into the cold spray additive manufacturing process. Further, it explores microstructure and properties, which are major concerns in the context of cold sprayed deposits. The book also highlights the strengthening strategies for cold sprayed deposits, from pre- and in-process to post-treatment. Lastly, it examines the current and potential applications of cold spray additive manufacturing.
Author: T.S. Srivatsan
Publisher: CRC Press
ISBN: 1351597191
Category : Technology & Engineering
Languages : en
Pages : 790
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Book Description
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.
Author: Yoshinori Nishida
Publisher: Springer Science & Business Media
ISBN: 443154237X
Category : Technology & Engineering
Languages : en
Pages : 212
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Book Description
This book is the first of its kind to deal with fabrication processes of metal matrix composites (MMCs) theoretically, experimentally, systematically, and instructively. The theoretical bases of fabrication processes and recycling processes of MMCs are established in this volume. Most other books in the field are concerned with the mechanics of properties, which is not easy for readers to grasp, and they introduce fabrication processes only as techniques without theoretical discussion. Because this book provides a clear image of the fabrication processes of MMCs without using complicated mathematics, readers can use production theory to create new composites. Also, fundamental concepts of recycling of MMCs are given in this book for the first time so as to meet the demands for solving environmental problems. This work originally was published in Japanese and has attained a high reputation among Japanese professors and researchers in the field.
Author: Suneev Anil Bansal
Publisher: CRC Press
ISBN: 1000626792
Category : Technology & Engineering
Languages : en
Pages : 316
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Book Description
Metal Matrix Composites (MMC) are materials that can be tailored to achieve specific properties, influenced by fabrication techniques. "Metal Matrix Composites: Fabrication, Production and 3D Printing" cover various aspects of fabrication, production and new manufacturing techniques including research and development. It includes conventional fabrication techniques and methods required to synthesize micro/nano MMCs. Multivariate approach required to optimize production including development of complex geometries is explained as well. Features: Provides in-depth information on fabrication, production, and advanced manufacturing of Metal Matrix Composites (MMCs). Details about matrix, reinforcement, and application-oriented fabrication processes. Emphasizes on advance processing methods like metal 3D printing, additive and subtractive manufacturing techniques. Provides comprehensive record of fabrication development in MMCs. Focus on materials and application-based processing techniques. This book aims at graduate students, researchers and professionals in micro/nano science and technology, mechanical engineering, industrial engineering, metallurgy, and composites.
