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Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties
Ma Y(马彦); 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.
Source PublicationSCIENTIFIC REPORTS
2017-11-15
Volume7Pages:10.1038/s41598-017-15905-5
ISSN2045-2322
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.

DOI10.1038/s41598-017-15905-5
Indexed BySCI
Language英语
WOS IDWOS:000415265800030
WOS KeywordTRANSFORMATION-INDUCED PLASTICITY ; HIGH-STRENGTH ; INTERNAL-STRESSES ; MAXIMUM STRENGTH ; LARGE DUCTILITY ; STEELS ; GRADIENT ; METALS ; MICROSTRUCTURE ; BEHAVIORS
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationNational Key R&D Program of China(2017YFA0204402) ; NSFC(11572328 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503) ; 11472286 ; 11672313)
DepartmentLNM材料介观力学性能的表征
Classification一类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/71932
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
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,2017,7:10.1038/s41598-017-15905-5.
APA Ma Y,Yang MX,Jiang P,Yuan FP,Wu XL,&Yuan, FP .(2017).Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties.SCIENTIFIC REPORTS,7,10.1038/s41598-017-15905-5.
MLA Ma Y,et al."Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties".SCIENTIFIC REPORTS 7(2017):10.1038/s41598-017-15905-5.
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