Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1

doi:10.1016/j.msea.2018.03.078

IMR OpenIR

	Deformation mechanism during high-temperature tensile test in an eutectic high-entropy alloy AlCoCrFeNi2.1
	Zhang, Yaoli 1,2; Wang, Xinguang 1; Li, Jinguo 1; Huang, Yaqi 1,2; Lu, Yiping 3; Sun, Xiaofeng 1
通讯作者	Wang, Xinguang(xgwang11b@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2018-05-02
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	724 页码:148-155
摘要	The 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.
关键词	Eutectic high-entropy alloy Ultra high ductility Miedema model calculation Precipitate phase Dynamic recrystallization
资助者	National Natural Science Foundation of China
DOI	10.1016/j.msea.2018.03.078
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51601192] ; National Natural Science Foundation of China[51671188]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000432640000018
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：97[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/128422
专题	中国科学院金属研究所
通讯作者	Wang, Xinguang; Li, Jinguo
作者单位	1.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
推荐引用方式 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.