Microstructure Characterization of Some Polycrystalline Materials


Book Description

In this book the results of preparation and microstructure characterization of some of the polycrystalline industrial materials are reported. It is well established that "tailor made" materials with desired properties can be obtained by controlling the defect related microstructure parameters. The microstructure of a material can be characterized from an analysis of X-ray diffraction line profile that provides a nondestructive indirect method for obtaining large number of microstructure parameters. Polycrystalline materials have been prepared by vacuum melting and high energy ball milling methods. Microstructure characterization of the prepared materials has been made using X-ray powder diffraction, high- resolution optical microscopy and transmission electron microscopy etc. Mechanical property of some of the metallic alloys in terms of microhardness has been measured and structure property correlation has been established for these materials. Special emphasis has been given to the modified Warren-Averbach s approach of Fourier analysis and Rietveld s method of whole powder diffraction profile fitting analysis.




Concise Dictionary of Materials Science


Book Description

A detailed knowledge of the terminology and its background is necessary for a fundamental understanding of the professional literature in the field of materials science. This sharply focused, authoritative lexicon affords the reader a coherent idea of microstructure formation and evolution. All the term definitions are supplied with explanations and cross-references, offering a consistent picture of microstructure in metallic and non-metallic polycrystalline materials. Written by an author with over thirty years of teaching and research experience, it fills the terminological gap between the textbooks on materials science and the professional literature. Concise Dictionary of Materials Science: Structure and Characterization of Polycrystalline Materials contains more than 1400 terms commonly used in modern literature, research, and practice. Throughout the dictionary, the emphasis is on lattice defects and their role in diffusion, plastic deformation and phase transitions, as well as on the granular structure and its formation and changes in the course of phase transitions, recrystallization, and grain growth. In addition, all the entries from the dictionary are presented in the English-German/German-English Glossary, providing in one volume quick access to the key concepts and terms in both of the languages. Highlighting structure description, formation, and characterization, Concise Dictionary of Materials Science is a very useful reference for students in materials science and engineering, for researchers, engineers, and technologists in metalworking, microelectronic, and ceramic industries, as well as for readers without a technical background.




Development of an Automated Characterization-representation Framework for the Modeling of Polycrystalline Materials in 3D


Book Description

Abstract: Over the past few years there have been significant advances in developing microstructure characterization methods that provide quantitative data describing the structure and crystallography of grain-level microstructures in three dimensions (3D). This work utilizes one such method, serial sectioning, with a focus on the automation of the process. The subsequent analysis and representation of the collected information can provide modeling and simulation efforts with a highly-refined and unbiased characterization of specific microstructural features. The grain structure of an engineering alloy could be translated directly into a 3D volume mesh for subsequent Finite Element (FE) analysis. However, this approach requires a multitude of data sets in order to appropriately sample the intrinsic heterogeneity observed in typical microstructures. In order to circumvent this issue, computation tools can be used to create synthetic microstructures that are statistically-equivalent to the measured structure. This manuscript will focus on the automation of the data collection process, the subsequent processing of the data, the robust quantitative characterization of the 3D structure, and the development of software programs that generate a host of synthetic structures which are analogous to the real material. Finally, this thesis will introduce new methods for inferring the 3D structure of a microstructure from only 2D sections. Importantly, the objective of this study is to provide a framework towards complete microstructure representation that is consistent with quantifiable experimental data.




Microstructural Characterization of Materials


Book Description

Microstructural characterization is usually achieved by allowing some form of probe to interact with a carefully prepared specimen. The most commonly used probes are visible light, X-ray radiation, a high-energy electron beam, or a sharp, flexible needle. These four types of probe form the basis for optical microscopy, X-ray diffraction, electron microscopy, and scanning probe microscopy. Microstructural Characterization of Materials, 2nd Edition is an introduction to the expertise involved in assessing the microstructure of engineering materials and to the experimental methods used for this purpose. Similar to the first edition, this 2nd edition explores the methodology of materials characterization under the three headings of crystal structure, microstructural morphology, and microanalysis. The principal methods of characterization, including diffraction analysis, optical microscopy, electron microscopy, and chemical microanalytical techniques are treated both qualitatively and quantitatively. An additional chapter has been added to the new edition to cover surface probe microscopy, and there are new sections on digital image recording and analysis, orientation imaging microscopy, focused ion-beam instruments, atom-probe microscopy, and 3-D image reconstruction. As well as being fully updated, this second edition also includes revised and expanded examples and exercises, with a solutions manual available at http://develop.wiley.co.uk/microstructural2e/ Microstructural Characterization of Materials, 2nd Edition will appeal to senior undergraduate and graduate students of material science, materials engineering, and materials chemistry, as well as to qualified engineers and more advanced researchers, who will find the book a useful and comprehensive general reference source.




Ceramic Fibers and Coatings


Book Description

High-temperature ceramic fibers are the key components of ceramic matrix composites (CMCs). Ceramic fiber properties (strength, temperature and creep resistance, for example)-along with the debonding characteristics of their coatings-determine the properties of CMCs. This report outlines the state of the art in high-temperature ceramic fibers and coatings, assesses fibers and coatings in terms of future needs, and recommends promising avenues of research. CMCs are also discussed in this report to provide a context for discussing high-temperature ceramic fibers and coatings.




Polycrystalline Materials


Book Description

The book "Polycrystalline Materials - Theoretical and Practical Aspects" is focused on contemporary investigations of plastic deformation, strength and grain-scale approaches, methods of synthesis, structurals, properties, and application of some polycrystalline materials. It is intended for students, post-graduate students, and scientists in the field of polycrystalline materials.




Diffraction Analysis of the Microstructure of Materials


Book Description

Overview of diffraction methods applied to the analysis of the microstructure of materials. Since crystallite size and the presence of lattice defects have a decisive influence on the properties of many engineering materials, information about this microstructure is of vital importance in developing and assessing materials for practical applications. The most powerful and usually non-destructive evaluation techniques available are X-ray and neutron diffraction. The book details, among other things, diffraction-line broadening methods for determining crystallite size and atomic-scale strain due, e.g. to dislocations, and methods for the analysis of residual (macroscale) stress. The book assumes only a basic knowledge of solid-state physics and supplies readers sufficient information to apply the methods themselves.




Improvements in the Characterization of Polycrystalline Thin Films


Book Description

Materials properties often depend critically on microstructure, especially in polycrystalline thin films. Improvements in characterization techniques are necessary to improve our understanding of structure-property relationships. In this work, we develop improvements for the quantitative measurement of grain boundary segregation, crystallographic texture, and the grain size distribution.




Statistical Methods for Materials Science


Book Description

Data analytics has become an integral part of materials science. This book provides the practical tools and fundamentals needed for researchers in materials science to understand how to analyze large datasets using statistical methods, especially inverse methods applied to microstructure characterization. It contains valuable guidance on essential topics such as denoising and data modeling. Additionally, the analysis and applications section addresses compressed sensing methods, stochastic models, extreme estimation, and approaches to pattern detection.




Materials Characterization Using Nondestructive Evaluation (NDE) Methods


Book Description

Materials Characterization Using Nondestructive Evaluation (NDE) Methods discusses NDT methods and how they are highly desirable for both long-term monitoring and short-term assessment of materials, providing crucial early warning that the fatigue life of a material has elapsed, thus helping to prevent service failures. Materials Characterization Using Nondestructive Evaluation (NDE) Methods gives an overview of established and new NDT techniques for the characterization of materials, with a focus on materials used in the automotive, aerospace, power plants, and infrastructure construction industries. Each chapter focuses on a different NDT technique and indicates the potential of the method by selected examples of applications. Methods covered include scanning and transmission electron microscopy, X-ray microtomography and diffraction, ultrasonic, electromagnetic, microwave, and hybrid techniques. The authors review both the determination of microstructure properties, including phase content and grain size, and the determination of mechanical properties, such as hardness, toughness, yield strength, texture, and residual stress. - Gives an overview of established and new NDT techniques, including scanning and transmission electron microscopy, X-ray microtomography and diffraction, ultrasonic, electromagnetic, microwave, and hybrid techniques - Reviews the determination of microstructural and mechanical properties - Focuses on materials used in the automotive, aerospace, power plants, and infrastructure construction industries - Serves as a highly desirable resource for both long-term monitoring and short-term assessment of materials