Cyclic deformation behaviour of a copper bicrystal with single-slip-oriented component crystals and a perpendicular grain boundary: cyclic stress-strain response and saturation dislocation observation

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	Cyclic deformation behaviour of a copper bicrystal with single-slip-oriented component crystals and a perpendicular grain boundary: cyclic stress-strain response and saturation dislocation observation
	Z. F. Zhang; Z. G. Wang
	1999
发表期刊	Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties
ISSN	0141-8610
卷号	79 期号:3 页码:741-752
摘要	The cyclic deformation behaviour of a [(5) over bar 913]-[(5) over bar 79] copper bicrystal with a grain boundary (GB) approximately perpendicular to the stress axis was investigated under constant-plastic-strain control at room temperature in air. In particular, the bicrystal contains two single-slip-oriented component crystals. The results showed that the cyclic stress-strain curve (CSSC) of the bicrystal exhibited two plateau regions in the axial plastic strain range of 1.8 x 10(-4)-1.35 x 10(-3) and 2.05 x 10(-3)-2.56 x 10(-3) respectively. The corresponding plateau axial saturation stresses were about 62-64 MPa and 70-71 MPa. During cyclic deformation, only the primary slip system B4 (111)[(1) over bar 01] within the two component crystals was activated including the vicinity of the GB at all the applied strain amplitudes. Meanwhile, it is found that the plastic strains carried by the [(5) over bar 913] and [(5) over bar 79] grains are obviously different owing to the difference in their orientations. By means of the electron channelling contrast technique in scanning electron microscopy, the surface dislocation patterns of the bicrystal were observed. The dislocation patterns in the two grains also showed an apparent difference. Based on the experimental results above, the effect of crystal orientation on the CSSC, surface slip patterns and saturation dislocation configurations within two grains was discussed.
部门归属	acad sinica, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china.;zhang, zf (reprint author), acad sinica, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china
关键词	Electron Channeling Contrast Fatigue Localization Amplitudes
URL	查看原文
WOS记录号	WOS:000079085100017
引用统计	被引频次：17[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/321006/37582
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. Cyclic deformation behaviour of a copper bicrystal with single-slip-oriented component crystals and a perpendicular grain boundary: cyclic stress-strain response and saturation dislocation observation[J]. Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties,1999,79(3):741-752.
APA	Z. F. Zhang,&Z. G. Wang.(1999).Cyclic deformation behaviour of a copper bicrystal with single-slip-oriented component crystals and a perpendicular grain boundary: cyclic stress-strain response and saturation dislocation observation.Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties,79(3),741-752.
MLA	Z. F. Zhang,et al."Cyclic deformation behaviour of a copper bicrystal with single-slip-oriented component crystals and a perpendicular grain boundary: cyclic stress-strain response and saturation dislocation observation".Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties 79.3(1999):741-752.