Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) High-Entropy Alloy

doi:10.11900/0412.1961.2021.00551

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	Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) High-Entropy Alloy
	Han Linzhi 2; Mu Juan 2; Zhou Yongkang 1; Zhu Zhengwang 1; Zhang Haifeng 1
刊名	ACTA METALLURGICA SINICA
	2022-09-11
卷号	58 期号:9 页码:1159-1168
关键词	refractory high-entropy alloy heat treatment mechanical property solid solution strengthening
ISSN号	0412-1961
DOI	10.11900/0412.1961.2021.00551
通讯作者	Mu Juan(muj@atm.neu.edu.cn)
英文摘要	Refractory high-entropy alloys (RHEAS) have great application potential in extreme conditions due to their outstanding high-temperature properties. However, several issues, such as high density, poor room temperature plasticity, and high cost limit their practical application. A new Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) (molar ratio) RHEA with a medium density of approximately 8.0 g/cm(3) was prepared to address the aforementioned issues; the effects of heat treatment temperature on the alloy's microstructure and mechanical properties were systematically examined. The findings indicate that as-cast Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2 )RHEA contains Zr-rich and Ta-rich bcc phases and lath-like Zr 5 Sn, intermetallics in the crystal. The volume fraction of the Ta-rich bcc phase gradually decreases with the increase in heat treatment temperature, and Zr5Sn3 intermetallic first increases and then decreases. The sample presents a near single-phase bcc structure when the heat treatment temperature is 1400 degrees C. A series of samples have good compressive plastic deformation ability under quasi-static conditions, and the alloy's yield strength increased gradually with an increasing heat treatment temperature. The sample's yield strength quenched at 1400 degrees C is as high as 1749 MPa. The alloy showed strain rate strengthening effect under dynamic loading, and the yield strength significantly increased. The sample's yield strength quenched at 1400 degrees C reaches 2750 MPa; however, the plastic deformation ability is reduced. The reason why the strength increases with the heat treatment temperature is that the 9.8% average atomic size difference results in a significant solid solution strengthening effect.
资助项目	National Natural Science Foundation of China[51771049] ; National Natural Science Foundation of China[51790484] ; National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact[JCKYS20-20602005]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000841981600007
资助机构	National Natural Science Foundation of China ; National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174542]
专题	金属研究所_中国科学院金属研究所
通讯作者	Mu Juan
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Han Linzhi,Mu Juan,Zhou Yongkang,et al. Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) High-Entropy Alloy[J]. ACTA METALLURGICA SINICA,2022,58(9):1159-1168.
APA	Han Linzhi,Mu Juan,Zhou Yongkang,Zhu Zhengwang,&Zhang Haifeng.(2022).Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) High-Entropy Alloy.ACTA METALLURGICA SINICA,58(9),1159-1168.
MLA	Han Linzhi,et al."Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of Ti(0.5)Zr(1.5)NibTa(0.5)Sn(0.2) High-Entropy Alloy".ACTA METALLURGICA SINICA 58.9(2022):1159-1168.