The Nature and Behavior of Grain Boundaries

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.

Inhalt
Structure of Grain Boundaries.- Structure of Grain Boundaries Theoretical Determination and Experimental Observations.- On Grain Boundary Dislocation Contrast in the Electron Microscope.- Some Properties of the Disclination Structure of Grain Boundaries.- Coincidence and Near-Coincidence Grain Boundaries in HCP Metals.- Computer Simulation of Asymmetric Grain Boundaries and their Interaction with Vacancies and Carbon Impurity Atoms.- Energetics of Grain Boundaries.- Grain Boundary Phase Transformations.- Behavior of Grain Boundaries Near the Melting Point.- The Interaction of Migrating Liquid Inclusions With Grain Boundaries in Solids.- An Electron Microscope Study of Configurational Equilibrium at Twin-Grain Boundary Intersections in Fcc Metals.- Grain Boundary Curvatures in Annealed Beta Brass.- Grain Boundary Motion and Related Phenomena.- On the Theory of Grain Boundary Motion.- The Behavior of Grain Boundaries During Recrystallization of Dilute Aluminum-Gold Alloys.- Mechanisms of Electromigration Damage in Metallic Thin Films.- Solute Effects on Grain Boundary Electro-Migration and Diffusion.- Growth Selection in High-Purity Cadmium.- A Crystallographic Alternative to the Coincidence Relationships in Copper.- Influence of Solutes on the Mobility of Tilt Boundaries.

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