Twinning and mechanical behavior of titanium aluminides and other intermetallics

被引：39
|
作者：
Yoo, MH [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA
来源：
INTERMETALLICS | 1998年 / 6卷 / 7-8期
关键词：
titanium aluminides (based on TiAl); mechanical properties; twinning; defects : twin dislocations; dislocation mobility;
D O I：
10.1016/S0966-9795(98)00033-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Based on the recent studies of deformation twinning in ordered intermetallics, the general background on slip-twinning-microcracking relationships is established. Specific roles of deformation twinning in the generalized plasticity of polycrystals and the crack-tip microplasticity are discussed in terms of the local strain compatibility by invoking both 'tension' and 'compression' twins. Special examples are given for gamma-TiAl, other L1(0) alloys, and Ti3Al of the D0(19) structure. Effects of composition, microstructure and temperature on defect properties that are relevant to the propensity of deformation twinning are discussed. (C) 1998 Elsevier Science Limited. All rights reserved.
引用
收藏
页码：597 / 602
页数：6
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