Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins

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

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Author(s)

  • Y. Cao
  • Y.B. Wang
  • X.H. An
  • X.Z. Liao
  • M. Kawasaki
  • S.P. Ringer
  • T.G. Langdon

Detail(s)

Original languageEnglish
Pages (from-to)98-101
Journal / PublicationScripta Materialia
Volume100
Online published14 Jan 2015
Publication statusPublished - 15 Apr 2015
Externally publishedYes

Abstract

We report a grain boundary formation mechanism in face-centred cubic metals with low stacking fault energies. Severe plastic deformation produces primary nano-twins with a twin boundary spacing of several nanometres, followed by secondary twinning through the activation of Shockley partial dislocations. The partial dislocations interact with primary twin boundaries, resulting in de-twinning of the primary twins and producing very high densities of sessile dislocations. The accumulation of these dislocations produces new grain boundaries with neighbouring grains having similar orientations.

Research Area(s)

  • De-twinning, Grain boundary, Grain refinement, Steel, Twinning

Citation Format(s)

Grain boundary formation by remnant dislocations from the de-twinning of thin nano-twins. / Cao, Y.; Wang, Y.B.; An, X.H.; Liao, X.Z.; Kawasaki, M.; Ringer, S.P.; Langdon, T.G.; Zhu, Y.T.

In: Scripta Materialia, Vol. 100, 15.04.2015, p. 98-101.

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