Regulation of short-range order and its influence on the multiscale mechanical behaviors in high entropy alloys

高熵合金短程有序调控及其对多尺度力学行为的影响

• 批准号: 21K03766
• 负责人: 魏 代修
• 金额: $ 2.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K03766/
• 关键词: High entropy alloys; Mechanical properties; Plasticity; Short range order; Crystal defects; High entropy alloy; Mechanical property; Microstructure

High-entropy alloys (HEAs) containing multiple principal metallic elements have extended the compositional space of alloys. We show that the realm of possibilities can be further expanded through substituting the constituent metals with metalloids, which are desirable for tailoring strength/ductility because they have chemical interactions and atomic sizes distinctly different from the host metallic elements. The mechanical properties can be further optimized by tuning the pre-strain-induced crystal defects. This strategy enables an unusual synergy of high tensile strength and extraordinary ductility for these single-phase alloys, which sheds lights on the development of high-performance metallic materials.

含有多种主要金属元素的高熵合金（HEA）扩展了合金的成分空间。我们表明，通过用准金属替代成分金属可以进一步扩展可能性的领域，这对于定制强度/延展性是可取的，因为它们具有与主体金属元素明显不同的化学相互作用和原子尺寸。通过调整预应变引起的晶体缺陷可以进一步优化机械性能。这种策略使这些单相合金实现了高拉伸强度和非凡延展性的不寻常协同作用，这为高性能金属材料的开发提供了线索。

项目成果

Temperature dependency of plastic deformation behavior in high entropy alloys

高熵合金塑性变形行为的温度依赖性

• 发表时间: 2022
• 作者: Daixiu Wei;Hidemi Kato
• 通讯作者: Hidemi Kato

Strengthening of high-entropy alloys via modulation of cryo-pre-straining-induced defects

• DOI: 10.1016/j.jmst.2022.04.055
• 发表时间: 2022-06
• 期刊: Journal of Materials Science & Technology
• 作者: Daixiu Wei;W. Gong;Liqiang Wang;Bowen Tang;T. Kawasaki;S. Harjo;Hidemi Kato

High-Temperature Deformation Behaviors of the C-Doped and N-Doped High Entropy Alloys

• DOI: 10.3390/met11101517
• 发表时间: 2021-09
• 期刊: Metals
• 影响因子: 2.9
• 作者: H. Yi;Yifan Zhang;Ren-Yi Xie;Meng Bi;Daixiu Wei

Metalloid substitution elevates simultaneously the strength and ductility of face-centered-cubic high-entropy alloys

• DOI: 10.1016/j.actamat.2021.117571
• 发表时间: 2021-12
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Daixiu Wei;Liqiang Wang;Yongjie Zhang;W. Gong;T. Tsuru;I. Lobzenko;Jianzhong Jiang;S. Harjo;T. Kawasaki;J. Bae;Weidong Lu;Zhen-Ming Lu;Y. Hayasaka;T. Kiguchi;N. Okamoto;T. Ichitsubo;Hyoung-Seop Kim;T. Furuhara;E. Ma;H. Kato

Bulk diffusion regulated nanopore formation during vapor phase dealloying of a Zn-Cu alloy

Zn-Cu 合金气相脱合金过程中体扩散调节纳米孔的形成

• DOI: 10.1016/j.actamat.2022.118210
• 发表时间: 2022
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Xia Yanjie;Lu Zhen;Han Jiuhui;Zhang Fan;Wei Daixiu;Watanabe Kentaro;Chen Mingwei
• 通讯作者: Chen Mingwei