Carbon-microalloying enhances strength-ductility synergy of (FeCoNi)<sub>90</sub>Al<sub>10</sub> medium-entropy alloy via tailoring precipitation

doi:10.1016/j.msea.2024.147329

IMR OpenIR

	Carbon-microalloying enhances strength-ductility synergy of (FeCoNi)₉₀Al₁₀ medium-entropy alloy via tailoring precipitation
	Cao, Fang 1; Feng, Hao 1,2; Huang, Yiduo 3,4; Li, Huabing 1,2; Wang, Xiaolan 5; Zhou, Gang 3,4; Zhang, Shucai 1,2; Zhu, Hongchun 1,2; Wang, Haijian 1; Jiang, Zhouhua 1,2
通讯作者	Li, Huabing(lihb@smm.neu.edu.cn) ; Zhou, Gang(gzhou@imr.ac.cn)
	2024-11-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	916 页码:13
摘要	The metastable high/medium-entropy alloys (H/MEAs) composing L12 nano-precipitates exhibit outstanding mechanical properties. In this work, the effect of carbon (C)-microalloying on the precipitation behavior and mechanical properties of (FeCoNi)90Al10 MEA was systematically investigated. With the addition of 0.2 at. % C, the yield strength of the alloy increased from 290.4 f 1.3 MPa to 343.1 f 2.8 MPa, the ultimate tensile strength increased from 648.5 f 3.5 MPa to 686.1 f 3.2 MPa, and the uniform elongation slightly increased after ageing for 45 min. C-microalloying resulted in a decrease of 0.85 kJ/mol and 0.26 kJ/mol in Gibbs free energy for facecentered cubic matrix to L12 and B2 phase transitions, facilitating the segregation of Al atom. This promoted the precipitation of L12 and B2 phases during ageing treatment, which enhanced ordering strengthening. The discontinuous precipitation was promoted at grain boundary after C-microalloying, providing an impetus for the movement of grain boundary. Meanwhile, the movement of grain boundary and the pinning of grain boundary by body-centered cubic precipitates resulted in the formation of grain boundary serration, which could release intergranular strain localization during deformation. Moreover, C-microalloying promoted the formation of planar slip and Taylor lattice during the deformation process, thus improving the plasticity. This finding provides a significant reference for C-microalloying and precipitate control of metastable MEAs.
关键词	Metastable medium entropy-alloy Carbon-microalloying Strength-ductility Nano-precipitates Grain boundary serration
资助者	National Natural Science Foundation of China ; Program of Introducing Talents of Discipline to Universities ; Joint Program of Science and Technology Plans in Liaoning Province
DOI	10.1016/j.msea.2024.147329
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52325406] ; National Natural Science Foundation of China[52374331] ; Program of Introducing Talents of Discipline to Universities[B21001] ; Joint Program of Science and Technology Plans in Liaoning Province[2023JH2/101800045] ; Joint Program of Science and Technology Plans in Liaoning Province[2023JH2/101700302]
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:001333036700001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190642
专题	中国科学院金属研究所
通讯作者	Li, Huabing; Zhou, Gang
作者单位	1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 2.Northeastern Univ, Key Lab Ecol Met Multimet Ores, Minist Educ, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shichangxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Anal & Testing Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cao, Fang,Feng, Hao,Huang, Yiduo,et al. Carbon-microalloying enhances strength-ductility synergy of (FeCoNi)₉₀Al₁₀ medium-entropy alloy via tailoring precipitation[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,916:13.
APA	Cao, Fang.,Feng, Hao.,Huang, Yiduo.,Li, Huabing.,Wang, Xiaolan.,...&Jiang, Zhouhua.(2024).Carbon-microalloying enhances strength-ductility synergy of (FeCoNi)₉₀Al₁₀ medium-entropy alloy via tailoring precipitation.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,916,13.
MLA	Cao, Fang,et al."Carbon-microalloying enhances strength-ductility synergy of (FeCoNi)₉₀Al₁₀ medium-entropy alloy via tailoring precipitation".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 916(2024):13.