Extremely high dislocation density and deformation pathway of CrMnFeCoNi high entropy alloy at ultralow temperature

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

18 Scopus Citations
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Author(s)

  • Stefanus Harjo
  • Takuro Kawasaki
  • Fan Zhang
  • Si Lan
  • Zhenduo Wu
  • Yuan Wu
  • Zhaoping Lu

Detail(s)

Original languageEnglish
Pages (from-to)21-25
Journal / PublicationScripta Materialia
Volume188
Online published13 Jul 2020
Publication statusPublished - Nov 2020

Abstract

The deformation behavior of CrMnFeCoNi high entropy alloy was investigated by in situ neutron diffraction at an ultralow temperature of 15 K. Analysis of the diffraction peak widths showed an extremely high dislocation density at 15 K, reaching ~1016 m−2. In addition, the dislocation density was found to closely follow the development of texture caused by deformation. In contrast to deformation by dislocation slip at room temperature, the ultralow-temperature deformation also involved stacking faults, twinning and serrations. The deformation pathway at ultralow temperature is outlined which is responsible for the extraordinary strength–ductility combination.

Research Area(s)

  • Dislocation density, High entropy alloy, Neutron diffraction, Plastic deformation, Stacking faults

Citation Format(s)

Extremely high dislocation density and deformation pathway of CrMnFeCoNi high entropy alloy at ultralow temperature. / Naeem, Muhammad; He, Haiyan; Harjo, Stefanus; Kawasaki, Takuro; Zhang, Fan; Wang, Bing; Lan, Si; Wu, Zhenduo; Wu, Yuan; Lu, Zhaoping; Liu, Chain T.; Wang, Xun-Li.

In: Scripta Materialia, Vol. 188, 11.2020, p. 21-25.

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