IMECH-IR  > 非线性力学国家重点实验室
Deformation mechanisms for superplastic behaviors in a dual-phase high specific strength steel with ultrafine grains
Wang W(王为); Yang MX(杨沐鑫); Yan DS(严定舜); 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, 15 North 4th Ring,West Rd, Beijing 100190, Peoples R China.
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2017-08-15
Volume702Pages:133-141
ISSN0921-5093
Abstract

The superplastic behaviors of a high specific strength steel (HSSS) with dual-phase microstructure and ultrafine grains have been investigated under a temperature range of 873-973 K and at a wide strain rate range of 10(-4)-10(-1)/s. The ultrafine grained HSSS exhibits excellent superplastic properties. The microstructure observations at interrupted strains for tests under temperature of 973 K and at strain rate of 10(-3)/s have provided evidences of different mechanisms for two stages. At the first stage (strain range from 0% to 400%), the superplastic flow is attributed to the diffusional transformation from fcc austenite phase to intermetallic compound B2 phase coupled with grain boundary sliding. While intragranular dislocation activities should be the dominant mechanism for the second stage (strain range from 400% to 629%) due to the increased realistic strain rate by diffusive necking. The grain sizes of both phases are observed to be relatively stable and remain always sub micron level during the high temperature tensile deformation, facilitating the superplastic flow.

KeywordHigh Specific Strength Steel Superplasticity Dual-phase Microstructure Ultrafine Grains Grain Boundary Sliding Diffusional Transformation
DOI10.1016/j.msea.2017.07.011
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000407983500016
WOS KeywordLOW-TEMPERATURE SUPERPLASTICITY ; INTERMETALLIC COMPOUND ; STRUCTURAL SUPERPLASTICITY ; TENSILE DEFORMATION ; MAGNESIUM ALLOY ; MICROSTRUCTURE ; TRANSFORMATION ; EVOLUTION ; FE3AL ; FEAL
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNSFC(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
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70039
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, 15 North 4th Ring,West Rd, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wang W,Yang MX,Yan DS,et al. Deformation mechanisms for superplastic behaviors in a dual-phase high specific strength steel with ultrafine grains[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,702:133-141.
APA Wang W.,Yang MX.,Yan DS.,Jiang P.,Yuan FP.,...&Yuan, FP .(2017).Deformation mechanisms for superplastic behaviors in a dual-phase high specific strength steel with ultrafine grains.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,702,133-141.
MLA Wang W,et al."Deformation mechanisms for superplastic behaviors in a dual-phase high specific strength steel with ultrafine grains".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 702(2017):133-141.
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