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Title:
Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties
Author: Ma Y(马艳); Yang MX(杨沐鑫); Jiang P(姜萍); Yuan FP(袁福平); Wu XL(武晓雷)
Source: SCIENTIFIC REPORTS
Issued Date: 2017-11-15
Volume: 7
Abstract: 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.
Language: 英语
Indexed Type: SCI
Corresponding Author: 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.
Correspondent Email: fpyuan@lnm.imech.ac.cn
DOI: 10.1038/s41598-017-15905-5
DOC Type: Article
WOS Subject: Multidisciplinary Sciences
WOS Subject Extended: Science & Technology - Other Topics
WOS Keyword Plus: TRANSFORMATION-INDUCED PLASTICITY ; HIGH-STRENGTH ; INTERNAL-STRESSES ; MAXIMUM STRENGTH ; LARGE DUCTILITY ; STEELS ; GRADIENT ; METALS ; MICROSTRUCTURE ; BEHAVIORS
WOS ID: WOS:000415265800030
ISSN: 2045-2322
Funder: National Key R&D Program of China(2017YFA0204402) ; NSFC(11572328 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503) ; 11472286 ; 11672313)
Department: LNM材料介观力学性能的表征
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/71932
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
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,2017-11-15,7.
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