IMR OpenIR
Simultaneous improvement of strength and plasticity: Additional work-hardening from gradient microstructure
Shao, CW; Zhang, P; Zhu, YK; Zhang, ZJ; Tian, YZ; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
2018-02-15
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume145Pages:413-428
AbstractEnhancing strength-ductility synergy of materials has always been a hot but difficult topic in material science, for most structural materials, steels in particular, it is inevitable to sacrifice ductility when increasing strength, and vice versa. In this study, by introducing a linear gradient in grain size into Fe-Mn-C twinning-induced plasticity (TWIP) steel, which is one of the promising structural steels in automobile industry, it is interesting to find that a simultaneous improvement of strength and plasticity (SISP) has been successfully achieved. It is believed that this evasion of strength-ductility trade-off may be mainly attributed to the formation of geometric necessary dislocations during tensile deformation, which contributes to an additional work-hardening especially in the later deformation. Such extraordinary strain hardening, which is inherent to the gradient structures and is absent in homogeneous materials, helps enhance the strength and delay the necking. This represents a novel strategy for the strength-ductility improvement which emphasizes the importance of work hardening and thickness of gradient layer (not a narrow sharp gradient) in material design. Inspired by this, other methods on optimizing structural design of the high-performance materials may be developed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Enhancing strength-ductility synergy of materials has always been a hot but difficult topic in material science, for most structural materials, steels in particular, it is inevitable to sacrifice ductility when increasing strength, and vice versa. In this study, by introducing a linear gradient in grain size into Fe-Mn-C twinning-induced plasticity (TWIP) steel, which is one of the promising structural steels in automobile industry, it is interesting to find that a simultaneous improvement of strength and plasticity (SISP) has been successfully achieved. It is believed that this evasion of strength-ductility trade-off may be mainly attributed to the formation of geometric necessary dislocations during tensile deformation, which contributes to an additional work-hardening especially in the later deformation. Such extraordinary strain hardening, which is inherent to the gradient structures and is absent in homogeneous materials, helps enhance the strength and delay the necking. This represents a novel strategy for the strength-ductility improvement which emphasizes the importance of work hardening and thickness of gradient layer (not a narrow sharp gradient) in material design. Inspired by this, other methods on optimizing structural design of the high-performance materials may be developed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[shao, c. w. ; zhang, p. ; zhu, y. k. ; zhang, z. j. ; tian, y. z. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [shao, c. w. ; zhang, z. f.] univ chinese acad sci, beijing 100049, peoples r china
KeywordMaterials Design Principles Cycle Fatigue Resistance Stress-strain Behavior Low-carbon Steels Mechanical-properties Fe-mn Tensile Properties Grain-orientation Austenitic Steel Twip Steels
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51301179, 51331007, 51501198, U1664253]; found of Shenyang National Laboratory for Materials Science (SYNL) [2017FP24]; IMR SYNL-T.S. Ke Research Fellowship
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79498
Collection中国科学院金属研究所
Corresponding AuthorZhang, P; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Shao, CW,Zhang, P,Zhu, YK,et al. Simultaneous improvement of strength and plasticity: Additional work-hardening from gradient microstructure[J]. ACTA MATERIALIA,2018,145:413-428.
APA Shao, CW.,Zhang, P.,Zhu, YK.,Zhang, ZJ.,Tian, YZ.,...&Zhang, ZF .(2018).Simultaneous improvement of strength and plasticity: Additional work-hardening from gradient microstructure.ACTA MATERIALIA,145,413-428.
MLA Shao, CW,et al."Simultaneous improvement of strength and plasticity: Additional work-hardening from gradient microstructure".ACTA MATERIALIA 145(2018):413-428.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Shao, CW]'s Articles
[Zhang, P]'s Articles
[Zhu, YK]'s Articles
Baidu academic
Similar articles in Baidu academic
[Shao, CW]'s Articles
[Zhang, P]'s Articles
[Zhu, YK]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Shao, CW]'s Articles
[Zhang, P]'s Articles
[Zhu, YK]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.