Cyclic deformation behavior and intergranular fatigue cracking of a copper bicrystal with a parallel grain boundary

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	Cyclic deformation behavior and intergranular fatigue cracking of a copper bicrystal with a parallel grain boundary
	Z. F. Zhang; Z. G. Wang; Y. M. Hu
	1999
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	272 期号:2 页码:410-417
摘要	Cyclic deformation behavior and intergranular fatigue cracking of a [4 9 16]/[4 9 27] copper bicrystal with a grain boundary (GB) parallel to the stress axis were investigated under constant plastic strain control at room temperature in air. It was found that cyclic saturation stresses of the bicrystal increased with increasing strain amplitude, and were higher than the plateau stress of 28-30 MPa, if modified by an orientation factor Omega(B) of the bicrystal. Surface observations showed that a GB affected zone (GBAZ) with secondary slip formed owing to plastic strain incompatibility near the GB. As cyclic deformation was continued, fatigue cracks always initiated at the intersection sites of persistent slip bands (PSBs) with the GB. Gradually, they linked each other along the GB, leading to intergranular cracking. However, fatigue crack nucleating along slip bands was not observed as intergranular cracking occurred. It is indicated that intergranular fatigue cracking is the major damage mode even though the GB was parallel to the stress axis. Based on the results above, the GB strengthening effect and intergranular fatigue cracking mechanism were discussed in combination with the GBAZ and the interaction between PSBs and GB. (C) 1999 Elsevier Science S.A. All rights reserved.
部门归属	chinese acad sci, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china.;zhang, zf (reprint author), chinese acad sci, inst met res, state key lab fatigue & fracture mat, 72 wenhua rd, shenyang 110015, peoples r china
关键词	Copper Bicrystal Cyclic Deformation Gb Affected Zone Gb Strengthening Intergranular Fatigue Cracking Stress-strain Curves Stage-i Propagation Single-crystals Nucleation Initiation Amplitude Polycrystals Metals Growth Model
URL	查看原文
WOS记录号	WOS:000083785900021
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37583
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Zhang,Z. G. Wang,Y. M. Hu. Cyclic deformation behavior and intergranular fatigue cracking of a copper bicrystal with a parallel grain boundary[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1999,272(2):410-417.
APA	Z. F. Zhang,Z. G. Wang,&Y. M. Hu.(1999).Cyclic deformation behavior and intergranular fatigue cracking of a copper bicrystal with a parallel grain boundary.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,272(2),410-417.
MLA	Z. F. Zhang,et al."Cyclic deformation behavior and intergranular fatigue cracking of a copper bicrystal with a parallel grain boundary".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 272.2(1999):410-417.