Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing

doi:10.1016/j.msea.2024.147609

IMR OpenIR

	Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing
	Wu, Liuwei 1; Liang, Yu 2; Yin, Haiyan 1; Shen, Yong 3; Chen, Xizhang 1
通讯作者	Yin, Haiyan(20160114@wzu.edu.cn) ; Chen, Xizhang(chenxizhang@wzu.edu.cn)
	2025-02-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	922 页码:16
摘要	In the work, cold rolling and annealing were applied to powder plasma arc additively manufactured (CoCrNi)94Al3Ti3 medium-entropy alloy (MEA) to efficiently attain different types of lattice defects and heterogeneous structures, thereby enhancing the strength of the alloy. Tensile tests show that mechanical properties of the MEA were significantly enhanced after cold rolling and annealing treatments compared to the directly deposited alloys. The microstructure and mechanical properties of cold rolled samples (50 % thickness reduction) annealed at 1073-1273 K for 1 h are compared. It has been shown that the MEAs prepared by additive manufacturing accumulate a large amount of deformation energy within the grains during the cold rolling process. This lead to recrystallized grains first nucleating within the original columnar grains, and efficient recrystallization could be realized. At annealing temperatures <= 1173 K, the recrystallized grain size has not been coarsened, the coarse and fine grains formed a heterogeneous grain structure, leading to significant back stress strengthening. TEM observations at different alloys indicate that the formation and increase in the number of multiple lattice defects (SFs, DTs, and L-C locks) is the main reason for the high work-hardening capacity of the alloy. This investigation demonstrates that the combined approach provides a novel means to fabricate high strength and ductile CoCrNibased MEAs.
关键词	Medium-entropy alloys Mechanical properties Additive manufacturing Microstructural evolution Deformation mechanisms
资助者	National Natural Science Foundation of China ; Major Science and Technology Inno-vation Project of Wenzhou City ; Graduate Scientific Research Foundation of Wenzhou University
DOI	10.1016/j.msea.2024.147609
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52261135544] ; Major Science and Technology Inno-vation Project of Wenzhou City[ZG2024035] ; Graduate Scientific Research Foundation of Wenzhou University[3162024003076]
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:001372890100001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：1[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/321006/181325
专题	中国科学院金属研究所
通讯作者	Yin, Haiyan; Chen, Xizhang
作者单位	1.Wenzhou Univ, Coll Mech & Elect Engn, Wenzhou 325035, Peoples R China 2.Jiangsu Lianjie Welding Technol Co LTD, Changzhou 213003, Peoples R China 3.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wu, Liuwei,Liang, Yu,Yin, Haiyan,et al. Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,922:16.
APA	Wu, Liuwei,Liang, Yu,Yin, Haiyan,Shen, Yong,&Chen, Xizhang.(2025).Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,922,16.
MLA	Wu, Liuwei,et al."Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 922(2025):16.