IMECH-IR  > 非线性力学国家重点实验室
Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels
Liu JB; Jin YB; Fang XY; Chen CX; Feng Q; Liu XW; Chen YZ; Suo T; Zhao F; Huang TL; Wang HT; Wang X; Fang YT; Wei YJ(魏宇杰); Meng L; Lu J; Yang W; Wang, HT (reprint author), Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China.; Lu, J (reprint author), City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China.
Source PublicationSCIENTIFIC REPORTS
2016
Volume6Pages:35345
ISSN2045-2322
AbstractStrength and ductility are mutually exclusive if they are manifested as consequence of the coupling between strengthening and toughening mechanisms. One notable example is dislocation strengthening in metals, which invariably leads to reduced ductility. However, this trend is averted in metastable austenitic steels. A one-step thermal mechanical treatment (TMT), i.e. hot rolling, can effectively enhance the yielding strength of the metastable austenitic steel from 322 +/- 18 MPa to 675 +/- 15 MPa, while retaining both the formability and hardenability. It is noted that no boundaries are introduced in the optimized TMT process and all strengthening effect originates from dislocations with inherited thermal stability. The success of this method relies on the decoupled strengthening and toughening mechanisms in metastable austenitic steels, in which yield strength is controlled by initial dislocation density while ductility is retained by the capability to nucleate new dislocations to carry plastic deformation. Especially, the simplicity in processing enables scaling and industrial applications to meet the challenging requirements of emissions reduction. On the other hand, the complexity in the underlying mechanism of dislocation strengthening in this case may shed light on a different route of material strengthening by stimulating dislocation activities, rather than impeding motion of dislocations.
DOI10.1038/srep35345
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000385314400001
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationH. Wang acknowledges the financial support from National Natural Science Foundation of China (Nos 11322219 and 11321202), the Fundamental Research Funds for the Central Universities of China (2014XZZX003-19). J. Liu acknowledges the support from the financial support from National Natural Science Foundation of China (Nos 11202183 and 11572281), the National High Technology Research and Development Program (863) of China under Grant No. 2011AA11A101, the State Key Laboratory for Strength and Vibration of Mechanical Structures Program of Xi'an Jiaotong University (SV2014-KF-13).
DepartmentLNM微结构计算力学(筹)
Classification一类
RankingTrue
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59768
Collection非线性力学国家重点实验室
Corresponding AuthorWang, HT (reprint author), Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China.; Lu, J (reprint author), City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China.
Recommended Citation
GB/T 7714
Liu JB,Jin YB,Fang XY,et al. Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels[J]. SCIENTIFIC REPORTS,2016,6:35345.
APA Liu JB.,Jin YB.,Fang XY.,Chen CX.,Feng Q.,...&Lu, J .(2016).Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels.SCIENTIFIC REPORTS,6,35345.
MLA Liu JB,et al."Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels".SCIENTIFIC REPORTS 6(2016):35345.
Files in This Item: Download All
File Name/Size DocType Version Access License
a2016-181.pdf(2322KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu JB]'s Articles
[Jin YB]'s Articles
[Fang XY]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu JB]'s Articles
[Jin YB]'s Articles
[Fang XY]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu JB]'s Articles
[Jin YB]'s Articles
[Fang XY]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: a2016-181.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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