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

doi:10.1103/PhysRevMaterials.5.083601

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

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

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 language	English
Article number	083601
Journal	Physical Review Materials
Volume	5
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevMaterials.5.083601
Publication status	Published - Aug 2021

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10.1103/PhysRevMaterials.5.083601

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

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.",

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AU - Moon, Jongun

AU - Tabachnikova, Elena

AU - Shumilin, Sergii

AU - Hryhorova, Tetiana

AU - Estrin, Yuri

AU - Brechtl, Jamieson

AU - Liaw, Peter K.

AU - Wang, Wenqing

AU - Dahmen, Karin A.

AU - Kim, Hyoung Seop

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AB - 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.

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

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