The strength-ductility balance of Al0.4CoCu0.6NiTix (x &lt;= 1.0) and Al0.4CoCu0.6NiSi0.2Tix (x &lt;= 0.5) high entropy alloys by regulating the proportion of Ti and improving the cooling rate

doi:10.1016/j.vacuum.2018.06.020

IMR OpenIR

	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, Yongxing 1; Zhu, Sheng 1; Wang, Xiaoming 1; Yang, Baijun 2; Ren, Zhiqiang 1; Han, Guofeng 1; Wen, Shu 3
通讯作者	Zhu, Sheng(mrzusg@126.com) ; Wang, Xiaoming(uwangxm@126.com)
	2018-09-01
发表期刊	VACUUM
ISSN	0042-207X
卷号	155 页码:270-279
摘要	The 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.
关键词	High entropy alloys Elements addition Rapid cooling Phase transformation Strength-ductility balance
资助者	International S&T Cooperation Program of China ; National Natural Science Foundation of China
DOI	10.1016/j.vacuum.2018.06.020
收录类别	SCI
语种	英语
资助项目	International S&T Cooperation Program of China[2015DFG51920] ; National Natural Science Foundation of China[51775556] ; National Natural Science Foundation of China[51375493]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000445440800039
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：10[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/321006/129569
专题	中国科学院金属研究所
通讯作者	Zhu, Sheng; Wang, Xiaoming
作者单位	1.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
推荐引用方式 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.