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Luders strain of the fine-grained material under the electric current
Zhang, Xinfang1; Zhou, Shuai1; Zhang, Hexiong1; Liu, Xuebing1; Yang, Huajie2
Corresponding AuthorZhang, Xinfang(xfzhang@ustb.edu.cn)
2021-09-21
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume825Pages:10
AbstractThe Hall-Petch-like relationship between the Luders strain and the average grain size of an Al-5.16Zn-2.2Mg1.46Cu alloy under the pulsed electric current is investigated. It is found that the Luders strain increases as the average grain size decreases. In addition, when the average grain size is the same, the current parameter has a significant effect on the absolute value of the slope in the Hall-Petch-like relationship. Based on the characteristics of interaction between the solute atoms and dislocations during the Luders strain, the competition between pinning behavior of solute atoms and depinning behavior of dislocations under the electric current is explored, and a relevant mathematical model is established. According to the new mathematical model, the difference of the above competitive behavior under two different current densities is analyzed. When the current density is 5 A/mm2, the pinning behavior of solute atoms is dominant in the competition, and the length of the yield plateau of each grain size becomes shorter; however, when the current density is 55 A/mm2, the dislocation depinning behavior dominants the competition and the Luders strain of each grain size increases. It is found that the current density can affect the competition between the pinning of solute atoms and the depinning of dislocations, thus affecting the Luders strain.
KeywordLuders strain Grain size Electric current Dislocation Solute atom Hall-petch relationship
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Central Universities, Recruitment Program of Global Experts
DOI10.1016/j.msea.2021.141924
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51874023] ; National Natural Science Foundation of China[U1860206] ; National Key Research and Development Program of China[2019YFC1908403] ; Fundamental Research Funds for the Central Universities, Recruitment Program of Global Experts[FRF-TP-20-04 B]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000696638200003
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166968
Collection中国科学院金属研究所
Corresponding AuthorZhang, Xinfang
Affiliation1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xinfang,Zhou, Shuai,Zhang, Hexiong,et al. Luders strain of the fine-grained material under the electric current[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,825:10.
APA Zhang, Xinfang,Zhou, Shuai,Zhang, Hexiong,Liu, Xuebing,&Yang, Huajie.(2021).Luders strain of the fine-grained material under the electric current.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,825,10.
MLA Zhang, Xinfang,et al."Luders strain of the fine-grained material under the electric current".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 825(2021):10.
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