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

CORC > 金属研究所 > 中国科学院金属研究所

	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
刊名	VACUUM
	2018-09-01
卷号	155 页码:270-279
关键词	High entropy alloys Elements addition Rapid cooling Phase transformation Strength-ductility balance
ISSN号	0042-207X
DOI	10.1016/j.vacuum.2018.06.020
通讯作者	Zhu, Sheng(mrzusg@126.com) ; Wang, Xiaoming(uwangxm@126.com)
英文摘要	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.
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
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000445440800039
资助机构	International S&T Cooperation Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129568]
专题	金属研究所_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.