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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)475-481
Journal / PublicationMaterials Research Letters
Volume7
Issue number12
Online published27 Aug 2019
Publication statusPublished - 2019
Externally publishedYes

Link(s)

Abstract

The 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.

Research Area(s)

  • dislocation width, dynamic strain aging, serrated flow, Strain hardening, temperature dependence

Citation Format(s)

Peierls barrier characteristic and anomalous strain hardening provoked by dynamic-strain-aging strengthening in a body-centered-cubic high-entropy alloy. / Chen, S. Y.; Wang, L.; Li, W. D. et al.
In: Materials Research Letters, Vol. 7, No. 12, 2019, p. 475-481.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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