Evolution of Adiabatic Shear Band in Ultra-Fine-Grained Iron under Dynamic Shear Loading

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	Evolution of Adiabatic Shear Band in Ultra-Fine-Grained Iron under Dynamic Shear Loading
	Yuan FP(袁福平); Wu XL(武晓雷); Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
会议录名称	NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2
	2011
页码	761-765
会议名称	5th International Conference on Nanomaterials by Severe Plastic Deformation
会议日期	MAR 21-25, 2011
会议地点	Nanjing, PEOPLES R CHINA
摘要	Ultra-fine-grained (UFG)/Nanocrystalline (NC) materials usually show reduced strain hardening and limited ductility due to formation of adiabatic shear band (ASB) under dynamic loading. In the present study, evolution of ASB in UFG Fe under dynamic shear loading was investigated. The UFG Fe was processed by equal-channel angular pressing (ECAP) via route B. After 6 passes, the grain size of UFG Fe reaches similar to 600 nm, as confirmed by means of Electron Back Scatter Diffraction (EBSD). Examination of micro-hardness and grain size of UFG Fe as a function of post-ECAP annealing temperature shows a transition from recovery to recrystallization at 500 degrees C. The high-strain-rate response of UFG Fe was characterized by hat-shaped specimen set-ups in Hopkinson bar experiments. The characteristics of ASB as a function of shear displacement, such as thickness of shear band and micro-hardness inside the shear band, were examined by SEM and Vickers micro-indentation respectively.
关键词	Adiabatic Shear Band Ufg Fe Hat-shaped Specimen Ebsd Severe Plastic-deformation Nanocrystalline
WOS记录号	WOS:000299234300126
课题组名称	LNM材料介观力学性能的表征
资助信息	Nanjing Univ Sci & Technol
URL	查看原文
收录类别	CPCI-S ; EI
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/45243
专题	非线性力学国家重点实验室
通讯作者	Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yuan FP,Wu XL,Yuan, FP . Evolution of Adiabatic Shear Band in Ultra-Fine-Grained Iron under Dynamic Shear Loading[C]NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2,2011:761-765.

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