Unraveling the discontinuous plastic flow of a Co-Cr-Fe-Ni-Mo multiprincipal-element alloy at deep cryogenic temperatures

Jongun Moon, Elena Tabachnikova, Sergii Shumilin, Tetiana Hryhorova, Yuri Estrin, Jamieson Brechtl, Peter K. Liaw, Wenqing Wang, Karin A. Dahmen, Hyoung Seop Kim

Research output: Contribution to journalArticlepeer-review

Abstract

We report an analysis of the discontinuous plastic flow of a multiprincipal-element alloy, Co17.5Cr12.5Fe55Ni10Mo5 (atomic percent, at. %), in the temperature range of 0.5-4.2 K showing serrated deformation curves. Using the analytical techniques, we studied the statistics of the stress drops associated with the unstable plastic flow. The analysis showed that the complexity and heterogeneity of a discontinuous plastic flow were reduced when the temperature was lowered. This behavior was associated with the effects of dynamic recovery and adiabatic heating on the dislocation-density evolution.

Original languageEnglish (US)
Article number083601
JournalPhysical Review Materials
Volume5
Issue number8
DOIs
StatePublished - Aug 2021

ASJC Scopus subject areas

  • General Materials Science
  • Physics and Astronomy (miscellaneous)

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