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The strength-ductility balance of Al0.4CoCu0.6NiTix (x <= 1.0) and Al0.4CoCu0.6NiSi0.2Tix (x <= 0.5) high entropy alloys by regulating the proportion of Ti and improving the cooling rate
Chen, Yongxing1; Zhu, Sheng1; Wang, Xiaoming1; Yang, Baijun2; Ren, Zhiqiang1; Han, Guofeng1; Wen, Shu3
Corresponding AuthorZhu, Sheng(mrzusg@126.com) ; Wang, Xiaoming(uwangxm@126.com)
2018-09-01
Source PublicationVACUUM
ISSN0042-207X
Volume155Pages:270-279
AbstractThe work prepared Al0.4CoCu0.6Ni(Si-0.2)Ti-x (x <= 1.0) and Si0.2Tix (x <= 0.5)) high entropy alloys (HEAs) with high strength and excellent plasticity by optimizing the added ratio of Ti and rapid cooling, discussed the effects of Ti and cooling rate on HEAs' microstructures and mechanical properties. The results showed that arc melted and copper injected Si0Tix HEAs' phase structures changed gradually from "fcc + L1(2) (Si0Ti0.25)" to "fcc + L1(2) + minor bcc (Si0Ti0.5)" and finally to "fcc + L1(2) + bcc + Ni3Ti-type phase (Si0Ti0.75, Si0Ti1.0)". But they transformed from "fcc + L1(2) + bcc + Ni16Ti6Si7-type phase (Si0.2Ti0.25)" to "fcc + L1(2) + bcc + AlNi2Ti-type + Ni16Ti6Si7-type phase (Si0.2Ti0.5)" for Si0.2Tix HEM. The micro-hardness of arc melted and copper injected HEAs gradually increased compared with Si0Ti0 matrix HEA and that of copper injected HEAs were larger than arc melted HEAs (except Si0Ti0.5). The compressive properties of Si0Ti0.25, Si0Ti0.5 and Si0.2Ti0.25 HEAs were relatively better, in which, the yield strengths of copper injected Si0Ti0.25, Si0Ti0.5 and Si0.2Ti0.25 HEM were 2.7, 2.9 and 4.8 times than that of arc melted Si0Ti0 matrix HEA (295 MPa), the fracture strain rates of the corresponding HEM were 47.1%, 22.4% and 13.5% respectively. It introduced three strengthening mechanisms of solid solution strengthening, trace phase transformation and fine grain strengthening and realized HEAs' strength-ductility balance.
KeywordHigh entropy alloys Elements addition Rapid cooling Phase transformation Strength-ductility balance
Funding OrganizationInternational S&T Cooperation Program of China ; National Natural Science Foundation of China
DOI10.1016/j.vacuum.2018.06.020
Indexed BySCI
Language英语
Funding ProjectInternational S&T Cooperation Program of China[2015DFG51920] ; National Natural Science Foundation of China[51775556] ; National Natural Science Foundation of China[51375493]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000445440800039
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129569
Collection中国科学院金属研究所
Corresponding AuthorZhu, Sheng; Wang, Xiaoming
Affiliation1.Army Acad Armored Forces, Natl Key Lab Remfg, Beijing 100072, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
3.Xiangtan Univ, Sch Mat Sci & Engn, Changsha 411105, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Chen, Yongxing,Zhu, Sheng,Wang, Xiaoming,et al. The strength-ductility balance of Al0.4CoCu0.6NiTix (x <= 1.0) and Al0.4CoCu0.6NiSi0.2Tix (x <= 0.5) high entropy alloys by regulating the proportion of Ti and improving the cooling rate[J]. VACUUM,2018,155:270-279.
APA Chen, Yongxing.,Zhu, Sheng.,Wang, Xiaoming.,Yang, Baijun.,Ren, Zhiqiang.,...&Wen, Shu.(2018).The strength-ductility balance of Al0.4CoCu0.6NiTix (x <= 1.0) and Al0.4CoCu0.6NiSi0.2Tix (x <= 0.5) high entropy alloys by regulating the proportion of Ti and improving the cooling rate.VACUUM,155,270-279.
MLA Chen, Yongxing,et al."The strength-ductility balance of Al0.4CoCu0.6NiTix (x <= 1.0) and Al0.4CoCu0.6NiSi0.2Tix (x <= 0.5) high entropy alloys by regulating the proportion of Ti and improving the cooling rate".VACUUM 155(2018):270-279.
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