Simultaneously enhancing the ultimate strength and ductility of high-entropy alloys via short-range ordering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Shuai Chen
  • Zachary H. Aitken
  • Subrahmanyam Pattamatta
  • Zhi Gen Yu
  • Peter K. Liaw
  • Yong-Wei Zhang

Detail(s)

Original languageEnglish
Article number4953
Journal / PublicationNature Communications
Volume12
Online published16 Aug 2021
Publication statusPublished - 2021

Link(s)

Abstract

Simultaneously enhancing strength and ductility of metals and alloys has been a tremendous challenge. Here, we investigate a CoCuFeNiPd high-entropy alloy (HEA), using a combination of Monte Carlo method, molecular dynamic simulation, and density-functional theory calculation. Our results show that this HEA is energetically favorable to undergo short-range ordering (SRO), and the SRO leads to a pseudo-composite microstructure, which surprisingly enhances both the ultimate strength and ductility. The SRO-induced composite microstructure consists of three categories of clusters: face-center-cubic-preferred (FCCP) clusters, indifferent clusters, and body-center-cubic-preferred (BCCP) clusters, with the indifferent clusters playing the role of the matrix, the FCCP clusters serving as hard fillers to enhance the strength, while the BCCP clusters acting as soft fillers to increase the ductility. Our work highlights the importance of SRO in influencing the mechanical properties of HEAs and presents a fascinating route for designing HEAs to achieve superior mechanical properties.

Research Area(s)

Citation Format(s)

Simultaneously enhancing the ultimate strength and ductility of high-entropy alloys via short-range ordering. / Chen, Shuai; Aitken, Zachary H.; Pattamatta, Subrahmanyam; Wu, Zhaoxuan; Yu, Zhi Gen; Srolovitz, David J.; Liaw, Peter K.; Zhang, Yong-Wei.

In: Nature Communications, Vol. 12, 4953, 2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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