Evolution of persistent slip bands and simulation of its stress field in a fatigued copper single crystal

IMR OpenIR

	Evolution of persistent slip bands and simulation of its stress field in a fatigued copper single crystal
	J. H. Yang; Y. Li; Z. Cai; S. X. Li; C. X. Ma; E. H. Han; W. Ke
	2003
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	345 期号:1-2 页码:164-171
摘要	The transition from the so-called matrix veins to persistent slip bands (PSBs) in a fatigued copper single crystal was observed by electron channeling contrast (ECC) technique in a scanning electron microscope (SEM). In the four stages of PSBs formation, the different dislocation patterns can be obtained by the experiment, namely, the veins, persistent slip lines (PSLs), embryos and well developed PSBs dislocation structures. In the consecutive four stages the typical dislocation structures were simulated and the internal stresses were calculated by the three-dimensional discrete dislocation method, correspondingly, the external stresses were calculated by the finite element method (FEM). The simulation shows that in the dislocation dense regions (veins and walls) the stress distributions are relatively more concentrated than that in the dislocation poor regions (channels and within a PSL). At the tips of the PSLs and embryos, the internal stresses were not substantially changed; however, at the tips of the PSLs and embryos the external stresses were much higher than that at the other regions. This will drive the PSLs and embryos to grow. (C) 2002 Elsevier Science B.V. All rights reserved.
部门归属	northeastern univ, dept mat phys, shenyang 110006, peoples r china.;yang, jh (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china
关键词	Fatigued Copper Single Crystal Evolution Of Persistent Slip Bands Simulation Of Stress Fields Dislocation-structures Cyclic Deformation Amplitudes
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36111
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. H. Yang,Y. Li,Z. Cai,et al. Evolution of persistent slip bands and simulation of its stress field in a fatigued copper single crystal[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2003,345(1-2):164-171.
APA	J. H. Yang.,Y. Li.,Z. Cai.,S. X. Li.,C. X. Ma.,...&W. Ke.(2003).Evolution of persistent slip bands and simulation of its stress field in a fatigued copper single crystal.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,345(1-2),164-171.
MLA	J. H. Yang,et al."Evolution of persistent slip bands and simulation of its stress field in a fatigued copper single crystal".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 345.1-2(2003):164-171.