期刊
SCRIPTA MATERIALIA
卷 100, 期 -, 页码 28-31出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.12.004
关键词
Bicrystal; Grain boundary; Twin boundary; Cyclic deformation; Fatigue cracking
类别
资金
- National Natural Science Foundation of China (NSFC) [51171194, 51331007, 51471170]
- IMR SYNL-T.S. Ke Research Fellowship
Cu bicrystals with a twin boundary (TB) and all {111} grain boundary (GB) were cyclically deformed. It is shown that the slip bands in the two component grains of both bicrystals are parallel to the TB and GB, respectively. Despite no piling up of dislocations, fatigue cracks still nucleate preferentially along the TB and GB in a shearing mode. The experimental results demonstrate that the inclined interfaces of {11 1) plane usually show low resistance to the shear fatigue cracking. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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