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Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1
Zhang, Yaoli1,2; Wang, Xinguang1; Li, Jinguo1; Huang, Yaqi1,2; Lu, Yiping3; Sun, Xiaofeng1
Corresponding AuthorWang, Xinguang(xgwang11b@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
2018-05-02
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume724Pages:148-155
AbstractThe deformation mechanism of an eutectic high-entropy alloy (EHEA) AlCoCrFeNi2.1 elevated temperature has been studied by tensile test, microstructure analysis and calculation. The ratio of the FCC and BCC phases has changed greatly after deformation. The formation enthalpies of L-12-type Ni3Al and B2-type NiAl are calculated by using Miedema model. Testing and calculation suggest that B2(II)precipitates (NiAl) have a priority in the precipitation order, which is critical to phase change. Besides, TEM results reveal that the function of B2(II) precipitates in FCC matrix during deformation is similar to Orowan by-passing mechanism, and the role of L1(2,II) precipitates in B2 matrix is regarded as dislocation cutting. Dynamic recrystallization, occurring in the FCC matrix, reduces stress concentration caused by dislocation motion, but it may be suppressed by B2(pi) precipitates. It has been identified that the softening mechanism of dynamic recrystallization and precipitation strengthening have an effect on the high temperature deformation process of the AlCoCrFeNi2.1 EHEA.
KeywordEutectic high-entropy alloy Ultra high ductility Miedema model calculation Precipitate phase Dynamic recrystallization
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.msea.2018.03.078
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51601192] ; National Natural Science Foundation of China[51671188]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000432640000018
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128422
Collection中国科学院金属研究所
Corresponding AuthorWang, Xinguang; Li, Jinguo
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
3.Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yaoli,Wang, Xinguang,Li, Jinguo,et al. Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,724:148-155.
APA Zhang, Yaoli,Wang, Xinguang,Li, Jinguo,Huang, Yaqi,Lu, Yiping,&Sun, Xiaofeng.(2018).Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,724,148-155.
MLA Zhang, Yaoli,et al."Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 724(2018):148-155.
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