Fatigue crack initiation and fracture behavior of a copper bicrystal with a perpendicular grain boundary

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	Fatigue crack initiation and fracture behavior of a copper bicrystal with a perpendicular 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	269 期号:1-2 页码:136-141
摘要	By cyclically deforming a [(5) over bar 913]perpendicular to[(5) over bar 79] copper bicrystal with a perpendicular grain boundary (GB), the fatigue crack initiation and fracture behavior were investigated. It was found that only the primary slip systems were activated on both G1[(5) over bar 913] and G2[(5) over bar 79] grains including the vicinity of the GB at axial plastic strain range of 1.8 x 10(-4)-2.56 x 10(-3). By observing the surface and fractography, it was confirmed that the fatigue cracks always nucleated and propagated along the GB, and displayed an obvious tendency on different surfaces. On the front surface of the bicrystal, the intergranular cracking was more preferential than that on the lateral surface, even though the geometrical conditions among PSB, GB and stress axis on the lateral surface claimed to enhance cracking are more close to those proposed by Christ (Mater. Sci. Eng. A117 (1989) L25). Based on the experimental results above, the effect of the interaction of PSB with GB and stress axis on intergranular fatigue cracking in the bicrystal is discussed. It is suggested that Christ's geometrical conditions for intergranular cracking might be further developed and the plastic strain incompatibility near the GB should play a more important effect on intergranular fatigue cracking. (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 Grain Boundary Fractography Intergranular Cracking Nucleation
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WOS记录号	WOS:000082276900018
引用统计	被引频次：19[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/321006/37584
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. Fatigue crack initiation and fracture behavior of a copper bicrystal with a perpendicular grain boundary[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1999,269(1-2):136-141.
APA	Z. F. Zhang,Z. G. Wang,&Y. M. Hu.(1999).Fatigue crack initiation and fracture behavior of a copper bicrystal with a perpendicular grain boundary.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,269(1-2),136-141.
MLA	Z. F. Zhang,et al."Fatigue crack initiation and fracture behavior of a copper bicrystal with a perpendicular grain boundary".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 269.1-2(1999):136-141.