A STUDY OF GRAIN-BOUNDARY TRANSLATIONAL STATES IN A SIGMA-3[110]/(111) BICRYSTAL

被引：4

作者：

DEYMIER, PA

SHAMSUZZOHA, M

WEINBERG, JD

机构：

[1] Department of Materials Science and Engineering, University of Arizona, Tucson

来源：

ACTA METALLURGICA ET MATERIALIA | 1991年 / 39卷 / 07期

关键词：

D O I：

10.1016/0956-7151(91)90244-U

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution electron microscopy images of a SIGMA-3[110BAR]/(111BAR) bicrystal produced by heavy cold rolling and annealing show a multiplicity of grain boundary core structures. Two grain boundary states are separated by a partial grain boundary dislocation with Burgers vector b = 1/2 b1 (where b1 = 1/6[112] is the Burgers vector of a secondary dislocation). This implies a change in translational state. All other structures are related through continuous transport of atoms from one grain to the other resulting in [111BAR] grain boundary steps. Calculations of the energy associated with the observed structures indicate that the two perfect twin states t = 0 and 2b1 are stable, while all other grain boundary translational states are metastable.

引用

页码：1571 / 1577

页数：7

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