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ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Goals are to understand factors affecting structure of grain boundaries in intermetallic compounds, understand how solute segregation affects grain boundary structure and causes embrittlement in Fe-base alloys, and explore control of grain boundary properties. Fe and boron-doped Ni[sub 3]Al and NiAl were studied. 7 figs, 1 tab, 18 refs.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Goals are to understand factors affecting structure of grain boundaries in intermetallic compounds, understand how solute segregation affects grain boundary structure and causes embrittlement in Fe-base alloys, and explore control of grain boundary properties. Fe and boron-doped Ni[sub 3]Al and NiAl were studied. 7 figs, 1 tab, 18 refs.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Goals are to understand factors affecting structure of grain boundaries in intermetallic compounds, understand how solute segregation affects grain boundary structure and causes embrittlement in Fe-base alloys, and explore control of grain boundary properties. Fe and boron-doped Ni3Al and NiAl were studied. 7 figs, 1 tab, 18 refs.
Author:
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ISBN:
Category :
Languages : en
Pages : 11
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Book Description
Observations have shown that the APB energy in boron-doped grain boundaries in Ni3Al decreases with increasing misorientation angle. Boron segregation to a grain boundary in Ni3Al has been observed for the first time using EELS. The boron distribution along a large angle grain boundary in Ni{sub 0.76}Al{sub 0.24} was shown to be not uniform. The boron-rich regions of the grain boundary were seen to have similar nickel bonding to bulk Ni3Al. Undoped and boron-poor regions of the grain boundary have bonding similar to that in pure Ni (less filled Ni d bands) which suggests these Ni atoms have fewer Al nearest neighbors and weaker Ni-Al bonding than in bulk Ni3Al. Finally, radiation damage was seen to occur in freshly prepared specimens at beam voltages as low as 100 kV but could be prevented by carbon coating the samples.
Author: Anning Hu
Publisher: Springer Science & Business Media
ISBN: 1475701810
Category : Technology & Engineering
Languages : en
Pages : 441
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Book Description
In view of the dramatically increased interest in the study of grain boundaries during the past few years, the Physical Metal lurgy Committee of The Institute of Metals Division of The Metal lurgical Society, AIME, sponsored a four-session symposium on the NATURE AND BEHAVIOR OF GRAIN BOUNDARIES, at the TMS-AIME Fall Meeting in Detroit, Michigan, October 18-19, 1971. The main ob jectives of this symposium were to examine the more recent develop ments, theoretical and experimental, in our understanding of grain boundaries, and to stimulate further studies in these and related areas. This volume contains most of the papers presented at the Symposium. It is regrettable that space limitations allow the inclusion of only four of the unsolicited papers, in addition to thirteen invited papers. The papers are grouped into three sections according to their major content: STRUCTURE OF GRAIN BOUNDARIES, ENERGETICS OF GRAIN BOUNDARIES, and GRAIN BOUNDARY MOTION AND RELATED PHENOMENA. Grain boundaries, or crystal interfaces, have been of both academic and practical interest for many years. An early seminar on "Metal Interfaces" was documented in 1952 by ASM. The Fourth Metallurgical Colloquium held in France, 1960, had a broad coverage on "Properties of Grain Boundaries". More recently the Australian Institute of Metals sponsored a conference on interfaces, with the proceedings being published by Butterworths in 1969.
Author: Robert Stuart Jupp
Publisher:
ISBN:
Category :
Languages : en
Pages : 390
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Book Description
Author: Tomasz Tański
Publisher: BoD – Books on Demand
ISBN: 9535128612
Category : Science
Languages : en
Pages : 186
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Book Description
This book contains eight chapters with original and innovative research studies in the field of grain boundaries. The results presented in the chapters of this book are very interesting and inspiring. This book will be very valuable to all researchers who are interested in the influence of grain boundaries on the structure and different kinds of properties of engineering materials. This book is also addressed to students and professional engineers working in the industry as well as to specialists who pay attention to all aspects related to grain boundaries and their impact on the various properties of innovative materials. The chapters of this book were developed by respected and well-known researchers from different countries.
Author: Vladimir V. Popov
Publisher: Trans Tech Publications Ltd
ISBN: 3038269875
Category : Technology & Engineering
Languages : en
Pages : 286
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Book Description
The majority of materials, especially metals, are used in the form of polycrystals. It is well recognized that many properties of polycrystalline materials are determined by grain boundaries (GBs). Grain boundaries appreciably affect many practically important mechanical and physical properties of construction materials. Grain-boundary diffusion plays a key role in such practically important processes as Coble creep, sintering, diffusion induced grain boundary migration (DIGM), various discontinuous reactions, recrystallization and grain growth. The purpose of this Volume is to provide a collection of recent contributions in the field of structure, thermodynamics and diffusion properties of grain boundaries and interfaces. The Volume includes reviews of both experimental and theoretical studies carried out by well-recognized scientists whose publications are well-known and widely cited.
Author: Louisette Priester
Publisher: Springer Science & Business Media
ISBN: 9400749694
Category : Technology & Engineering
Languages : en
Pages : 458
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Book Description
Grain boundaries are a main feature of crystalline materials. They play a key role in determining the properties of materials, especially when grain size decreases and even more so with the current improvements of processing tools and methods that allow us to control various elements in a polycrystal. This book presents the theoretical basis of the study of grain boundaries and aims to open up new lines of research in this area. The treatment is light on mathematical approaches while emphasizing practical examples; the issues they raise are discussed with reference to theories. The general approach of the book has two main goals: to lead the reader from the concept of ‘ideal’ to ‘real’ grain boundaries; to depart from established knowledge and address the opportunities emerging through "grain boundary engineering", the control of morphological and crystallographic features that affect material properties. The book is divided in three parts: I ‘From interganular order to disorder’ deals with the concept of the perfect grain boundary, at equilibrium, and questions the maintenance of its crystalline state. II ‘From the ideal to the real grain boundary’ deals with the concept of the faulted grain boundary. It attempts to reveal the influence of the grain boundary structure on its defects, their formation and their accommodation. III ‘From free to constrained grain boundaries’ is devoted to grain boundary ensembles starting from the triple junction (the elemental configuration) to real grain boundary networks in polycrystals This part covers a new and topical development in the field. It presents for the first time an avenue for researchers working on macroscopic aspects, to approach the scale of description of grain boundaries. Audience: graduate students, researchers and engineers in Materials Science and all those scientists pursuing grain boundary engineering in order to improve materials performance.
Author: John David Budai
Publisher:
ISBN:
Category : Grain boundaries
Languages : en
Pages : 460
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Book Description
Author: Gunter Gottstein
Publisher: CRC Press
ISBN: 9780849382222
Category : Technology & Engineering
Languages : en
Pages : 454
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Book Description
The behavior of adjacent materials at the boundary where they meet is an essential aspect of creating new engineering materials. Grain Boundary Migration in Metals is an authoritative account of the physics of grain boundary motion, written by two highly respected researchers. They provide a comprehensive overview of current knowledge regarding the migration process and how it affects microstructure evolution, focusing their treatment exclusively on the properties and behavior of grain boundaries with well defined geometry and crystallography. With their emphasis on applications-such as the characterization of microstructure and texture, recrystallization, and grain growth-the authors effectively fill the gap between the physics of grain boundary motion and its engineering practicality. The need for better microstructural design motivates permanent thrust for research in the field, and continued rapid progress appears inevitable. Grain Boundary Migration in Metals provides a solid foundation in the phenomena and serves as a valuable reference for professionals in materials science, solid state physics, and any industry engaged in metals production and the heat treatment of metals and alloys.
