Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy

S. Y. Chen; L. Wang; W. D. Li; Y. Tong; K. K. Tseng; C. W. Tsai; J. W. Yeh; Y. Ren; W. Guo; J. D. Poplawsky; P. K. Liaw

doi:10.1080/21663831.2019.1658233

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Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy

Original Report | 更新时间：2026-08-19

- Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy
- Materials Research Letters Vol. 7, Issue 12, Pages: 475-481(2019)
- 作者机构：
  
  1. Department of Materials Science and Engineering The University of Tennessee Knoxville
  2. Department of Materials Science and Engineering National Tsing Hua University Hsinchu Taiwan
  3. High Entropy Materials Center National Tsing Hua University
  4. ray Science Division Argonne National Laboratory Argonne,X
  5. Center for Nanophases Materials Sciences Oak Ridge National Laboratory Oak Ridge
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1658233
  CLC：
- Online First：27 August 2019，
  
  Published：2019
- 稿件说明：
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S. Y. Chen, L. Wang, W. D. Li, et al. Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy[J]. Materials Research Letters, 2019, 7(12): 475-481.
DOI：

S. Y. Chen, L. Wang, W. D. Li, et al. Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy[J]. Materials Research Letters, 2019, 7(12): 475-481. DOI： 10.1080/21663831.2019.1658233.

摘要

Abstract

BSTRACTThe temperature effect on the mechanical behavior of the HfNbTaTiZr high entropy alloy (HEA) was investigated at 77–673 K. The decrease of the yield strength with increasing the temperature was mechanistically analyzed by considering contributions from various strengthening mechanisms. An anomalous dependence of strain hardening on temperature was observed and was justified to be caused by dynamic strain aging (DSA) as an extra strengthening mechanism at elevated temperatures. A model was constructed to split the overall strain hardening into forest hardening and DSA hardening

both of which were theoretically quantified at all temperatures considered.

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