On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

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

3 Scopus Citations
View graph of relations

Author(s)

  • Shuying Chen
  • Weidong Li
  • Fanchao Meng
  • Yang Tong
  • Hua Zhang
  • Ko-Kai Tseng
  • Jien-Wei Yeh
  • Fei Xu
  • Zhenggang Wu
  • Peter K. Liaw

Detail(s)

Original languageEnglish
Article number113919
Journal / PublicationScripta Materialia
Volume200
Online published16 Apr 2021
Publication statusPublished - 15 Jul 2021
Externally publishedYes

Abstract

Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10−5 s−1-1 × 10−3 s−1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.

Research Area(s)

  • Dynamic strain aging, High-entropy alloys, Portevin-Le Chatelier effect, Serrated flow, Theoretical modeling

Citation Format(s)

On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy. / Chen, Shuying; Li, Weidong; Meng, Fanchao; Tong, Yang; Zhang, Hua; Tseng, Ko-Kai; Yeh, Jien-Wei; Ren, Yang; Xu, Fei; Wu, Zhenggang; Liaw, Peter K.

In: Scripta Materialia, Vol. 200, 113919, 15.07.2021.

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