Achieving superior tensile properties by facile thermo-mechanical treatment in an as-cast brittle Fe-based medium entropy alloy

doi:10.1016/j.msea.2024.147679

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	Achieving superior tensile properties by facile thermo-mechanical treatment in an as-cast brittle Fe-based medium entropy alloy
	Han, Chengfu 1; Du, Zhenyu 1; Fu, Chaoqun 1; Zhang, Suo 2; Wang, Tan 1; Wu, Shaojie 1; Chen, Chen 1; Cai, Yongfu 1; Wei, Ran 1; Li, Fushan 1
	2025-02
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	922
摘要	To obtain an alloy with excellent mechanical properties and low cost, Fe 62 +x Ni 13-x Cr 15 Si 7 Al 3 (at. %) medium entropy alloys (MEAs) were designed in this work. The as-cast microstructure transformed from dual-phase BCC + FCC to single-phase BCC with Ni content decreasing from 13 to 11 at. % for Fe 62 +x Ni 13-x Cr 15 Si 7 Al 3 (x = 0, 1 and 2). It was found that as-cast Fe63Ni12Cr15Si7Al3 alloy (BCC + very little FCC) with brittle fracture characteristics can still be cold rolled even to 85 %. The facile thermomechanical treatment leads to the exceptional mechanical properties of the cast brittle Fe63Ni12Cr15Si7Al3 MEA. Specifically, its yield strength (YS) and ultimate tensile strength (UTS) at 77 K reach impressive values of 1424 and 1814 MPa, respectively, and the uniform elongation (UE) remains 36 %. This is due to multi-reinforcement synergy mechanisms including ultra-fine grains, B2 nano-precipitations, annealing twins, high-density dislocations and transformation induced plasticity (TRIP) effect during deformation. Furthermore, the YS, UTS and UE of the MEA at 298 K is 882 MPa, 1077 MPa and 21 %. The deformable B2 particles can contribute to both strength and plasticity during tension at 298 K, which is different from the result caused mainly by bypass mechanism at 77 K. This work provides a new idea for performance enhancement of Fe-based MEAs by designing and ascertaining critical element content.
关键词	Medium entropy alloy Thermo-mechanical treatment Nano-precipitations Phase transformation Mechanical properties
其他关键词	PLASTICITY ; MICROSTRUCTURE ; PRECIPITATION ; DUCTILITY ; STRENGTH ; STEELS ; DEFORMATION ; BEHAVIOR ; STRESS ; STRAIN
DOI	10.1016/j.msea.2024.147679
收录类别	SCIE
语种	英语
资助项目	National Natural Science Foundation of China (NSFC) [52101053]; Natural Science Foundation of Henan Provinces [242300421430]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001390444600001
出版者	ELSEVIER SCIENCE SA
原始文献类型	Article
EISSN	1873-4936
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/174273
专题	国家开放大学
通讯作者	Wang, Tan; Wu, Shaojie; Li, Fushan
作者单位	1.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China; 2.Henan Open Univ, Sch Mech & Elect Engn & Intelligent Mfg, Zhengzhou 450008, Peoples R China
推荐引用方式 GB/T 7714	Han, Chengfu,Du, Zhenyu,Fu, Chaoqun,et al. Achieving superior tensile properties by facile thermo-mechanical treatment in an as-cast brittle Fe-based medium entropy alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,922.
APA	Han, Chengfu.,Du, Zhenyu.,Fu, Chaoqun.,Zhang, Suo.,Wang, Tan.,...&Li, Fushan.(2025).Achieving superior tensile properties by facile thermo-mechanical treatment in an as-cast brittle Fe-based medium entropy alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,922.
MLA	Han, Chengfu,et al."Achieving superior tensile properties by facile thermo-mechanical treatment in an as-cast brittle Fe-based medium entropy alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 922(2025).