New ternary equi-atomic refractory medium-entropy alloys with tensile ductility: Hafnium versus titanium into NbTa-based solution

doi:10.1016/j.intermet.2019.01.004

IMR OpenIR

	New ternary equi-atomic refractory medium-entropy alloys with tensile ductility: Hafnium versus titanium into NbTa-based solution
	Wang, Shao-Ping 1,2; Ma, Evan 3; Xu, Jian 1
通讯作者	Xu, Jian(jianxu@imr.ac.cn)
	2019-04-01
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	107 页码:15-23
摘要	We demonstrate that based on NbTa as the base solution, ternary equiatomic HfNbTa and TiNbTa single-phase body-centered-cubic (BCC) solid solutions are achieved at arc-melted alloy ingots. These add interesting new members into the group of ternary refractory medium-entropy alloys (RMEAs), previously available only in NbTiZr. Moreover, HfNbTa and TiNbTa are the first two ternary RMEAs that exhibit tensile ductility, with HfNbTa having a combination of yield strength and tensile strain on par with its high-entropy counterpart, the Senkov alloy TiZrHfNbTa. We also show that alloying Hf into the base NbTa solution manifests a much higher strengthening potency compared with Ti. This difference can be rationalized using empirical parameters and models accounting for the size and modulus misfits among constituent elements.
关键词	Medium-entropy alloys Solid solution hardening Refractory metals Tensile properties BCC structure
资助者	National Natural Science Foundation of China ; JHU by US NSF-DMR
DOI	10.1016/j.intermet.2019.01.004
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51571192] ; JHU by US NSF-DMR[1804320]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000461401900004
出版者	ELSEVIER SCI LTD
引用统计	被引频次：67[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/321006/132420
专题	中国科学院金属研究所
通讯作者	Xu, Jian
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
推荐引用方式 GB/T 7714	Wang, Shao-Ping,Ma, Evan,Xu, Jian. New ternary equi-atomic refractory medium-entropy alloys with tensile ductility: Hafnium versus titanium into NbTa-based solution[J]. INTERMETALLICS,2019,107:15-23.
APA	Wang, Shao-Ping,Ma, Evan,&Xu, Jian.(2019).New ternary equi-atomic refractory medium-entropy alloys with tensile ductility: Hafnium versus titanium into NbTa-based solution.INTERMETALLICS,107,15-23.
MLA	Wang, Shao-Ping,et al."New ternary equi-atomic refractory medium-entropy alloys with tensile ductility: Hafnium versus titanium into NbTa-based solution".INTERMETALLICS 107(2019):15-23.