Dislocation Emission from Grain Boundaries in High-Entropy Alloys: Influence of Atomic Compositions at Grain Boundaries

DOI Web Site Web Site 6 References
  • SHIOTANI Kohei
    Division of Mechanical Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University
  • NIIYAMA Tomoaki
    Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University
  • SHIMOKAWA Tomotsugu
    Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University

Bibliographic Information

Other Title
  • ハイエントロピー合金における粒界からの転位放出現象: 粒界を構成する原子組成の不均質性の影響
  • ハイエントロピー ゴウキン ニ オケル リュウカイ カラ ノ テンイ ホウシュツ ゲンショウ : リュウカイ オ コウセイ スル ゲンシ ソセイ ノ フキンシツセイ ノ エイキョウ

Search this article

Abstract

<p>High-Entropy Alloys (HEAs) are alloys in solid solution with five or more elements and exhibit excellent mechan-ical properties. However, the mechanism has not been fully understood yet. Because general grain boundaries (GBs) contain various size of atomic free volume, a deviation of atomic compositions at GBs may appear in HEAs by replacing atoms with different atomic sizes to reduce atomic free volume at GBs. In this study, the influence of the deviation of atomic compositions at GBs on dislocation emission from GBs in HEAs is investigated through two dimensional atomic simulations. Various equiatomic HEAs with five elements are modeled by a modified Morse (two body atomic) potential. Thermal equilibrium GBs at finite temperatures are obtained by hybrid Monte Carlo-molecular dynamics simulations. As results, GBs in HEAs mainly consist of two elements with the minimum and maximum atomic size and the critical stress to emit dislocations from the GBs increases as the deviation of atomic compositions becomes large.</p>

Journal

References(6)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top