Shear localization in dynamic deformation of copper single crystals

IMR OpenIR

	Shear localization in dynamic deformation of copper single crystals; Shear localization in dynamic deformation of copper single crystals
	S. X. Li; R. Q. Yang; J. W. Li; Z. F. Zhang
	2006 ; 2006
发表期刊	Philosophical Magazine ; Philosophical Magazine
ISSN	1478-6435 ; 1478-6435
卷号	86 期号:36 页码:5769-5786
摘要	Dynamic deformation of copper single crystals, especially of fatigued copper single crystals with different orientations, was conducted on a split-Hopkinson pressure bar apparatus. The strain rates were in the range 2 - 9 x 10(3) s(-1). After dynamic deformation, the adiabatic shear bands (ASBs) were examined in a light microscope and SEM. The width and spacing of ASBs formed under different strain rates in a fatigued copper single crystal were measured and the spacing of ASBs is one-order of magnitude smaller than the theoretical predictions. The possible reasons for the discrepancy were discussed. The critical strains for the ASB formation in four different orientated single crystals at stain rate of about 4 x 10(3) s(-1) were determined by examining the post-deformation specimens and dynamic stress-strain curves. It is clearly indicated that the critical strains for the ASB formation are orientation-dependent in copper single crystals. A simple microscopic mechanism for ASB formation in fatigued single crystals was proposed.; Dynamic deformation of copper single crystals, especially of fatigued copper single crystals with different orientations, was conducted on a split-Hopkinson pressure bar apparatus. The strain rates were in the range 2 - 9 x 10(3) s(-1). After dynamic deformation, the adiabatic shear bands (ASBs) were examined in a light microscope and SEM. The width and spacing of ASBs formed under different strain rates in a fatigued copper single crystal were measured and the spacing of ASBs is one-order of magnitude smaller than the theoretical predictions. The possible reasons for the discrepancy were discussed. The critical strains for the ASB formation in four different orientated single crystals at stain rate of about 4 x 10(3) s(-1) were determined by examining the post-deformation specimens and dynamic stress-strain curves. It is clearly indicated that the critical strains for the ASB formation are orientation-dependent in copper single crystals. A simple microscopic mechanism for ASB formation in fatigued single crystals was proposed.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, sx (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;shxli@imr.ac.cn ; chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, sx (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;shxli@imr.ac.cn
关键词	Persistent Slip Bands Persistent Slip Bands Electron Channeling Contrast Electron Channeling Contrast Low-amplitude Low-amplitude Fatigue Fatigue Dislocation-structures Dislocation-structures Cyclic Deformation Cyclic Deformation Strain-rate Strain-rate Fcc Fcc Crystals Crystals Behavior Behavior Evolution Evolution Polycrystals Polycrystals
URL	查看原文 ; 查看原文
WOS记录号	WOS:000242291400001 ; WOS:000242291400001
引用统计	被引频次：9[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/321006/34310
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. X. Li,R. Q. Yang,J. W. Li,et al. Shear localization in dynamic deformation of copper single crystals, Shear localization in dynamic deformation of copper single crystals[J]. Philosophical Magazine, Philosophical Magazine,2006, 2006,86, 86(36):5769-5786, 5769-5786.
APA	S. X. Li,R. Q. Yang,J. W. Li,&Z. F. Zhang.(2006).Shear localization in dynamic deformation of copper single crystals.Philosophical Magazine,86(36),5769-5786.
MLA	S. X. Li,et al."Shear localization in dynamic deformation of copper single crystals".Philosophical Magazine 86.36(2006):5769-5786.