Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing
文献类型：期刊论文
| 作者 | Wu, Liuwei1; Liang, Yu2; Yin, Haiyan1; Shen, Yong3; Chen, Xizhang1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 922页码:16 |
| 关键词 | Medium-entropy alloys Mechanical properties Additive manufacturing Microstructural evolution Deformation mechanisms |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2024.147609 |
| 通讯作者 | Yin, Haiyan(20160114@wzu.edu.cn) ; Chen, Xizhang(chenxizhang@wzu.edu.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:001372890100001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Major Science and Technology Inno-vation Project of Wenzhou City ; Graduate Scientific Research Foundation of Wenzhou University |
| 源URL |  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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