Fe-Mn-Al-C high-entropy steels with superior mechanical properties at 4.2 K

doi:10.1016/j.matdes.2023.111840

IMR OpenIR

	Fe-Mn-Al-C high-entropy steels with superior mechanical properties at 4.2 K
	Ren, Jia-kuan 1; Zhang, Long 2; Li, Zhi-hong 1; Chen, Jun 1; Zhang, Wei-na 1; Wu, Si-wei 1; Liu, Zhen-yu 1
通讯作者	Zhang, Long(zhanglong@imr.ac.cn) ; Liu, Zhen-yu(zyliu@mail.neu.edu.cn)
	2023-04-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	228 页码:15
摘要	There exist urgent demands to develop structural materials with superior mechanical properties at 4.2 K. Some high-entropy steels (HESs) show potentials as cryogenic materials, but their deformation behaviors and mechanical properties at 4.2 K have been rarely investigated. Moreover, the aging-induced embrit-tlement of HESs also severely restricts their applications. In this work, the Fe-Mn-Al-C HESs with different Al contents (0, 4, 10 or 15 at.%) and grain sizes were fabricated, and their deformation behaviors and mechanical properties at 4.2 K were systematically studied. With increasing the Al content, (Fe, Mn)23C6 carbides are effectively inhibited in 10%Al HES after aging at 923 K for 10 days. Therefore, the premature fracture of 10%Al HES is avoided, leading to the excellent combination of high strength (-1.5 GPa) and high fracture toughness (255 MPaGreek ano teleiam1/2) at 4.2 K. The deformation mechanisms shift from the extensive twinning and deformation bands in 0Al HES to the lesser twinning, Taylor lattices and deformation bands in 10%Al HES, which contribute to the high strength and ductility of the 10%Al HES. Furthermore, the 10%Al HES with larger grains displays a much higher fracture toughness at 4.2 K, and this inverse size effect on the cryogenic toughness was elaborately revealed. (c) 2023 Northeastern University. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
关键词	High-entropy steel Fe-Mn-Al-C Extremely-low temperature Fracture toughness Al content Grain size
资助者	Central Guiding Local Science and Technology Development Fund of Liaoning Province ; Youth Innovation Promotion Association CAS ; National Science Foundation of China
DOI	10.1016/j.matdes.2023.111840
收录类别	SCI
语种	英语
资助项目	Central Guiding Local Science and Technology Development Fund of Liaoning Province[2022JH6/100100062] ; Youth Innovation Promotion Association CAS[2021188] ; National Science Foundation of China[52104370] ; National Science Foundation of China[20210203]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000997550400001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：10[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/321006/177905
专题	中国科学院金属研究所
通讯作者	Zhang, Long; Liu, Zhen-yu
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automation, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ren, Jia-kuan,Zhang, Long,Li, Zhi-hong,et al. Fe-Mn-Al-C high-entropy steels with superior mechanical properties at 4.2 K[J]. MATERIALS & DESIGN,2023,228:15.
APA	Ren, Jia-kuan.,Zhang, Long.,Li, Zhi-hong.,Chen, Jun.,Zhang, Wei-na.,...&Liu, Zhen-yu.(2023).Fe-Mn-Al-C high-entropy steels with superior mechanical properties at 4.2 K.MATERIALS & DESIGN,228,15.
MLA	Ren, Jia-kuan,et al."Fe-Mn-Al-C high-entropy steels with superior mechanical properties at 4.2 K".MATERIALS & DESIGN 228(2023):15.