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Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties
Ma Y(马艳); Yang MX(杨沐鑫); Jiang P(姜萍); 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.; Yuan, FP (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
2017-11-15
发表期刊SCIENTIFIC REPORTS
卷号7
ISSN2045-2322
摘要Nanostructured metals have high strength while they usually exhibit limited uniform elongation. While, a yield strength of approximately 2.1 GPa and a uniform elongation of about 26% were achieved in a severely deformed Fe-24.8% Ni-6.0% Al-0.38% C alloy in the present work. The plastic deformation mechanisms for the coarse-grained (CG) sample and the cold-rolled (CR) samples of this alloy were investigated by a series of mechanical tests and microstructure characterizations before and after tensile tests. No obvious phase transformation was observed during the tensile deformation for the CG sample, and the plastic deformation was found to be mainly accommodated by deformation twins and dislocation behaviors. While significant phase transformation occurs for the CR samples due to the facts that the deformed grains by CR are insufficient to sustain the tensile deformation themselves and the flow stress for the CR samples is high enough to activate the martensite transformation. The amount of phase transformation increases with increasing thickness reduction of CR, resulting in excellent tensile ductility in the severely deformed alloy. The back stress hardening was found to play a more important role in the CR samples than in the CG sample due to the dynamically reinforced heterogeneous microstructure by phase transformation.
DOI10.1038/s41598-017-15905-5
收录类别SCI
语种英语
WOS记录号WOS:000415265800030
关键词[WOS]TRANSFORMATION-INDUCED PLASTICITY ; HIGH-STRENGTH ; INTERNAL-STRESSES ; MAXIMUM STRENGTH ; LARGE DUCTILITY ; STEELS ; GRADIENT ; METALS ; MICROSTRUCTURE ; BEHAVIORS
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
项目资助者National Key R&D Program of China(2017YFA0204402) ; NSFC(11572328 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503) ; 11472286 ; 11672313)
课题组名称LNM材料介观力学性能的表征
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/71932
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.; Yuan, FP (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
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GB/T 7714
Ma Y,Yang MX,Jiang P,et al. Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties[J]. SCIENTIFIC REPORTS,2017,7.
APA 马艳.,杨沐鑫.,姜萍.,袁福平.,武晓雷.,...&Yuan, FP .(2017).Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties.SCIENTIFIC REPORTS,7.
MLA 马艳,et al."Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties".SCIENTIFIC REPORTS 7(2017).
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