The effect of Ti/Al ratios on the evolution of precipitates and their effects on tensile properties for Fe3.75Cr1.25NiAl0.6-xTix high entropy alloys

doi:10.1016/j.intermet.2024.108505

IMR OpenIR

	The effect of Ti/Al ratios on the evolution of precipitates and their effects on tensile properties for Fe_3.75Cr_1.25NiAl_0.6-xTi_x high entropy alloys
	Ji, Yu 1; Zhang, Hongwei 1; Pang, Jingyu 1; Xing, Zhenqiang 1; Zhang, Long 1; Zhu, Zhengwang 2; Wang, Aimin 1; Zhang, Haifeng 2
通讯作者	Zhang, Hongwei(hongweizhang@imr.ac.cn) ; Pang, Jingyu(jypang17s@imr.ac.cn) ; Wang, Aimin(amwang@imr.ac.cn)
	2024-12-01
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	175 页码:9
摘要	The work developed a series of novel Co-free high-entropy alloys (HEAs), i.e. Fe3.75Cr1.25NiAl0.6-xTix (x = 0, 0.15, 0.30 and 0.40, molar ratio) HEAs abbreviated as Ti0, Ti0.15, Ti0.30 and Ti0.40, respectively. The effects of Ti/Al ratio (Al partially replaced by Ti) on the microstructure and tensile properties were investigated systematically. The Ti0 HEA contains the FCC phase in dendritic regions and the BCC and B2 phases (BCC/B2) in interdendritic regions. Moreover, the spherical ordered B2 nanoparticles are embedded in the BCC matrix. With increasing the Ti/Al ratio from 0 to 1/3, there is a phase transition from B2-NiAl to L2(1)-Ni2AlTi. Furthermore, the morphology of the nanoparticles evolves from spherical to cuboidal. With further increasing the Ti/Al ratio from 1/3 to 1 and 2, the morphology of nanoparticles evolves from cuboidal back to spherical. In addition, the Ti0.40 HEA has sigma phases besides FCC, BCC, and L2(1) phases. The analysis of tensile properties shows that properly adjusting Ti/Al ratios sharply improves the plasticity and slightly improves the ultimate strength, but only causes a limited decrease in the yield strength. Specifically, the Ti0.15 HEA has a superior combination of strength and plasticity, exhibiting a yield strength of 819 MPa, an ultimate strength of 1113 MPa, and a fracture strain of 13.4 %. The SRO, the solid-solution strengthening, the phase transformation, and the shape of nanoparticles were discussed in detail, which reveals the origins of the excellent tensile properties. In addition, the excessive addition of Ti forms the sigma phase, leading to a serious brittleness. These findings are believed to promote the development of low-cost HEAs with BCC/L21 for practical applications.
关键词	HEAs Microstructure evolution and tensile properties B2 and L2(1) nanoparticles
资助者	Liaoning Key Research and Development Program, China ; Chinese Academy of Sciences, China ; Natural Science Foundation of Liaoning Province, China ; Youth Innovation Promotion Association CAS, China ; IMR Innovation Fund, China
DOI	10.1016/j.intermet.2024.108505
收录类别	SCI
语种	英语
资助项目	Liaoning Key Research and Development Program, China[2022JH2/101300080] ; Chinese Academy of Sciences, China[ZDBS-LY-JSC023] ; Natural Science Foundation of Liaoning Province, China[2023-BS-012] ; Youth Innovation Promotion Association CAS, China[2021188] ; IMR Innovation Fund, China[2023-PY16]
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:001320606700001
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190299
专题	中国科学院金属研究所
通讯作者	Zhang, Hongwei; Pang, Jingyu; Wang, Aimin
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 Met, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Ji, Yu,Zhang, Hongwei,Pang, Jingyu,et al. The effect of Ti/Al ratios on the evolution of precipitates and their effects on tensile properties for Fe_3.75Cr_1.25NiAl_0.6-xTi_x high entropy alloys[J]. INTERMETALLICS,2024,175:9.
APA	Ji, Yu.,Zhang, Hongwei.,Pang, Jingyu.,Xing, Zhenqiang.,Zhang, Long.,...&Zhang, Haifeng.(2024).The effect of Ti/Al ratios on the evolution of precipitates and their effects on tensile properties for Fe_3.75Cr_1.25NiAl_0.6-xTi_x high entropy alloys.INTERMETALLICS,175,9.
MLA	Ji, Yu,et al."The effect of Ti/Al ratios on the evolution of precipitates and their effects on tensile properties for Fe_3.75Cr_1.25NiAl_0.6-xTi_x high entropy alloys".INTERMETALLICS 175(2024):9.