材料科学技术(英文版)2021，Vol.72Issue(13) ：52-60.

Elemental partitioning as a route to design precipitation-hardened high entropy alloys

Feng He Bin Han Zhongsheng Yang Da Chen Guma Yeli Yang Tong Daixiu Wei Junjie Li Zhijun Wang Jincheng Wang Ji-jung Kai
材料科学技术(英文版)2021，Vol.72Issue(13) ：52-60.
✕
  • NETL
  • NSTL
  • 维普
  • 万方数据

Elemental partitioning as a route to design precipitation-hardened high entropy alloys

Feng He 1Bin Han 2Zhongsheng Yang 3Da Chen 4Guma Yeli 5Yang Tong 6Daixiu Wei 7Junjie Li 3Zhijun Wang 3Jincheng Wang 3Ji-jung Kai4
扫码查看

作者信息

  • 1. Centre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China
  • 2. Centre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China;Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an, 710021, China
  • 3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China
  • 4. Centre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China;Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
  • 5. Centre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China
  • 6. Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
  • 7. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai, Miyagi, 980-8577,Japan
  • 折叠

Abstract

Precipitation-hardened high entropy alloys (HEAs) with carefully tuned compositions have shown excellent mechanical properties,demonstrating great potential for engineering applications.However,due to the lack of precise multiple phase diagrams,the composition design of multi-principal-component HEAs still inevitably relies on the extremely time-consuming trial-and-error approach.The present study,on the basis of powerful composition quantification ability of atom probe tomography (APT) technology,proposed a framework to guide the quantitative design of precipitation-hardened HEAs.In this framework,the elemental partitioning was used as a crucial route to avoid the thermodynamic challenge of designing precipitation-hardened HEAs.As a case study,the role of Ti/Al ratio in the design of γ-γ'HEAs was predicted through the proposed framework and then validated by experimental studies.The framework predicted that when the total content of Ti and Al is fixed,a higher Ti/Al ratio makes γ-γ'HEA stronger.APT and mechanical results agreed well with these predictions and validated the feasibility of the framework.These findings provided a new route to design the precipitation-hardened alloys and a deeper insight into the design of γ-γ'HEA.

Key words

Elemental partitioning/Alloy design/Atom probe tomography/High entropy alloys

引用本文复制引用

基金项目

This work was financially supported by the Hong Kong Research Grant Council(CityU 11212915)

This work was financially supported by the Hong Kong Research Grant Council(CityU 11205018)

National Natural Science foundation of China(51771149)

National Natural Science foundation of China(52001266)

National Natural Science foundation of China()

National Natural Science foundation of China(51901119)

Natural Science Foundation of ShaanXi Province in China(2020JQ-720)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量38
段落导航相关论文