Delayed plasticity during nanoindentation of single-phase CoCrFeMnNi high-entropy alloy

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

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Author(s)

  • J. F. Zeng
  • S. Wang
  • C. Zhu
  • T. G. Nieh
  • Z. P. Lu

Detail(s)

Original languageEnglish
Pages (from-to)300-305
Journal / PublicationMaterials Research Letters
Volume5
Issue number5
Early online date15 Dec 2016
StatePublished - 3 Sep 2017

Abstract

Spherical nanoindentation was performed at room temperature to characterize the time-dependent plasticity behavior of the single-phase CoCrFeMnNi high-entropy alloy (HEA). It was observed that incipient plasticity occurred after a period of waiting time in the apparent elastic regime. Through the experimental data, an activation energy ∼ 0.74 eV and an activation volume ∼ 1.54b3 (b = Burgers vector) were extracted for the delayed plasticity. Our results indicate that heterogeneous dislocation nucleation governs the delayed plasticity in the single-phase CoCrFeMnNi, and also provide quantitative insights into viscoplastic behavior and creep mechanisms in HEAs.

Research Area(s)

  • delayed plasticity, dislocation nucleation, High-entropy alloys, nanoindentation

Citation Format(s)

Delayed plasticity during nanoindentation of single-phase CoCrFeMnNi high-entropy alloy. / He, Q. F.; Zeng, J. F.; Wang, S.; Ye, Y. F.; Zhu, C.; Nieh, T. G.; Lu, Z. P.; Yang, Y.

In: Materials Research Letters, Vol. 5, No. 5, 03.09.2017, p. 300-305.

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