Twin boundary: Stronger or weaker interface to resist fatigue cracking?

被引：75
作者：
Zhang, P. [1 ]
Zhang, Z. J. [1 ]
Li, L. L. [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 | 2012年 / 66卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Twin boundary; Fatigue crack; Slip band; Stacking fault energy; Orientation; HIGH-CYCLE FATIGUE; LATTICE DISLOCATIONS; PLANAR-SLIP; DEFORMATION; MECHANISM; ORIGIN;
D O I：
10.1016/j.scriptamat.2012.01.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The fatigue cracking mechanisms at twin boundaries (TBs) are investigated by considering the stacking fault energy, dislocation slip mode and the difference in the Schmid factors (DSF) between matrix and twin. In Cu and its alloys, the occurrence of TB cracking becomes much more frequent with either increasing the alloying component or the DSF. Considering the interactions between dislocations and TBs, a semiquantitative relationship based on the statistical experimental results is established to describe the TB cracking mechanism. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：854 / 859
页数：6
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