Twin boundaries: Strong or weak?

被引：76

作者：

Qu, S. ^{[1
]}

Zhang, P. ^{[1
]}

Wu, S. D. ^{[1
]}

Zang, Q. S. ^{[1
]}

Zhang, Z. F. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Cu-Al alloy; Twin boundary; Fatigue cracking; Stacking fault energy;

D O I：

10.1016/j.scriptamat.2008.07.037

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fatigue cracking along twin boundaries (TBs) has significantly different features in Cu and Cu-Al alloys. In Cu and Cu-5 at.% Al alloy, the TBs are intrinsically strong and resist fatigue cracking. With the decrease in stacking fault energy (SFE), some fatigue cracks were observed along or near the TBs in Cu-16 at.% Al alloys. The current findings confirm that the TBs are not always strong enough to prevent fatigue cracking, which is also affected by SFE or slip mode. (C) 2008 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

引用

页码：1131 / 1134

页数：4

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