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Back stress strengthening and strain hardening in gradient structure
Yang MX(杨沐鑫); Pan Y; Yuan FP(袁福平); Zhu YT; Wu XL(武晓雷); Wu, XL (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China.
Source PublicationMATERIALS RESEARCH LETTERS
2016
Volume4Issue:3Pages:145-151
ISSN2166-3831
AbstractWe report significant back stress strengthening and strain hardening in gradient structured (GS) interstitial-free (IF) steel. Back stress is long-range stress caused by the pileup of geometrically necessary dislocations (GNDs). A simple equation and a procedure are developed to calculate back stress basing on its formation physics from the tensile unloading-reloading hysteresis loop. The gradient structure has mechanical incompatibility due to its grain size gradient. This induces strain gradient, which needs to be accommodated by GNDs. Back stress not only raises the yield strength but also significantly enhances strain hardening to increase the ductility. [GRAPHICS] .
KeywordBack Stress Geometrically Necessary Dislocations Work Hardening Ductility Gradient Structure
DOI10.1080/21663831.2016.1153004
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000385011000003
WOS KeywordBack Stress ; Geometrically Necessary Dislocations ; Work Hardening ; Ductility ; Gradient Structure
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding OrganizationThis work was supported by the National Natural Science Foundation of China under Grant numbers (11572328, 11072243, 11222224, 11472286, and 51471039) ; and 973 Projects under Grant numbers (2012CB932203, 2012CB937500, and 6138504). Y.T.Z. is funded by the US Army Research Office (W911 NF-12-1-0009), the US National Science Foundation (DMT-1104667), and by the Jiangsu Key Laboratory of Advanced Micro&Nano Materials and Technology, Nanjing Univ of Sci and Technol.
DepartmentLNM材料介观力学性能的表征
Classification一类
RankingFalse
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59706
Collection非线性力学国家重点实验室
Corresponding AuthorWu, XL (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Yang MX,Pan Y,Yuan FP,et al. Back stress strengthening and strain hardening in gradient structure[J]. MATERIALS RESEARCH LETTERS,2016,4(3):145-151.
APA Yang MX,Pan Y,Yuan FP,Zhu YT,Wu XL,&Wu, XL .(2016).Back stress strengthening and strain hardening in gradient structure.MATERIALS RESEARCH LETTERS,4(3),145-151.
MLA Yang MX,et al."Back stress strengthening and strain hardening in gradient structure".MATERIALS RESEARCH LETTERS 4.3(2016):145-151.
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