IMECH-IR  > 非线性力学国家重点实验室
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
Source PublicationNANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2
2011
Pages761-765
Conference Name5th International Conference on Nanomaterials by Severe Plastic Deformation
Conference DateMAR 21-25, 2011
Conference PlaceNanjing, PEOPLES R CHINA
AbstractUltra-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.
KeywordAdiabatic Shear Band Ufg Fe Hat-shaped Specimen Ebsd Severe Plastic-deformation Nanocrystalline
WOS IDWOS:000299234300126
DepartmentLNM材料介观力学性能的表征
Funding OrganizationNanjing Univ Sci & Technol
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Indexed ByCPCI-S ; EI
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45243
Collection非线性力学国家重点实验室
Corresponding AuthorYuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
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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