On the Heterogeneity of Local Shear Strain Induced by High-Pressure Torsion

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

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Author(s)

  • Wei Jiang
  • Hao Zhou
  • Yang Cao
  • Jinfeng Nie
  • Yusheng Li
  • Yonghao Zhao
  • Megumi Kawasaki
  • Terence G. Langdon

Detail(s)

Original languageEnglish
Article number1900477
Journal / PublicationAdvanced Engineering Materials
Volume22
Issue number1
Online published30 Aug 2019
Publication statusPublished - Jan 2020
Externally publishedYes

Abstract

A ductile duplex stainless steel consisting of a ferrite phase and an austenitic phase is chosen as a model material to investigate the development of shear strain patterns under high-pressure torsion. Systematic analysis on the macroscopic and microscopic heterogeneities of local shear strain reveals that complex shear patterns can be developed only above a high strain level where the grain sizes are already refined to a steady state. It is concluded that grain boundary-mediated deformation mechanisms provide sufficient freedom for reshaping the austenite phase domains, and thus the intrinsic factor required for the formation of these complicated shear patterns is well-developed ultrafine grains and/or nanograins.

Research Area(s)

  • deformation twinning, high-pressure torsion, microstructures, shear strains, steels

Citation Format(s)

On the Heterogeneity of Local Shear Strain Induced by High-Pressure Torsion. / Jiang, Wei; Zhou, Hao; Cao, Yang; Nie, Jinfeng; Li, Yusheng; Zhao, Yonghao; Kawasaki, Megumi; Langdon, Terence G.; Zhu, Yuntian.

In: Advanced Engineering Materials, Vol. 22, No. 1, 1900477, 01.2020.

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