Microstructure and tensile properties of Co-free Fe4CrNi(AlTi)(x) high-entropy alloys

doi:10.1016/j.intermet.2021.107339

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructure and tensile properties of Co-free Fe4CrNi(AlTi)(x) high-entropy alloys
	Ji, Yu 1,2; Zhang, Long 2; Lu, Xing 1; Fu, Huameng 2; Zhu, Zhengwang 2; Li, Hong 2; Zhang, Hongwei 2; Zhang, Haifeng 2
刊名	INTERMETALLICS
	2021-11-01
卷号	138 页码:8
关键词	High-entropy alloys Microstructure Tensile properties Phase-evolution L2(1) nanoprecipitates
ISSN号	0966-9795
DOI	10.1016/j.intermet.2021.107339
通讯作者	Zhang, Long(zhanglong@imr.ac.cn) ; Lu, Xing(lu@djtu.edu.cn) ; Zhang, Hongwei(hongweizhang@imr.ac.cn)
英文摘要	According to parameters of atomic size difference (delta), valence electron concentration (VEC) and the cost effectiveness, a series of high Fe-content and Co-free Fe4CrNi(AlTi)(x) (x = 0.2, 0.6 and 1.0) high-entropy alloys (HEAs) were designed. Effects of the content of Al and Ti on the microstructure and tensile properties were investigated. It is found that the constituent phases change from the single face-centered cubic (FCC) phase to FCC + body-centered cubic (BCC) + L2(1) phases and BCC + L2(1) phases as the Al and Ti content increases from 0.2 to 0.6 and 1.0, respectively. With increasing the Al and Ti content, the strength increases but the tensile plasticity decreases. Specifically, Fe4CrNi(AlTi)(0.6) exhibits a good combination of a high strength of 858 MPa and a large tensile plasticity of 12.8%. The excellent tensile properties of this alloy are attributed to the synergetic effects of a soft FCC phase and hard BCC/L2(1) phases, and moreover, the uniform distribution of high-density L2(1) nanoparticles in the BCC phase also benefits the tensile properties. In addition, the phase-evolution principles in the current HEAs and in many previously-reported HEAs are well discussed within the framework of delta and VEC parameters. These findings are believed to promote the development of low-cost HEAs with high performance for practical applications.
资助项目	National Key Research and Development Program of China[2018YFB0703402] ; National Natural Science Foundation of China[51701213] ; National Natural Science Foundation of China[51790484] ; National Natural Science Foundation of China[52074257] ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science[2019010248-JH3/301] ; Liaoning Revitalization Talents Program[XLYC1802078] ; Liaoning Revitalization Talents Program[XLYC1807062] ; Chinese Academy of Sciences[ZDBS-LY-JSC023] ; Youth Innovation Promotion Association CAS[2021188]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000696575600004
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science ; Liaoning Revitalization Talents Program ; Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/166971]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Long; Lu, Xing; Zhang, Hongwei
作者单位	1.Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ji, Yu,Zhang, Long,Lu, Xing,et al. Microstructure and tensile properties of Co-free Fe4CrNi(AlTi)(x) high-entropy alloys[J]. INTERMETALLICS,2021,138:8.
APA	Ji, Yu.,Zhang, Long.,Lu, Xing.,Fu, Huameng.,Zhu, Zhengwang.,...&Zhang, Haifeng.(2021).Microstructure and tensile properties of Co-free Fe4CrNi(AlTi)(x) high-entropy alloys.INTERMETALLICS,138,8.
MLA	Ji, Yu,et al."Microstructure and tensile properties of Co-free Fe4CrNi(AlTi)(x) high-entropy alloys".INTERMETALLICS 138(2021):8.