Ductility by shear band delocalization in the nano-layer of gradient structure

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

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Author(s)

  • Fuping Yuan
  • Dingshun Yan
  • Jiangda Sun
  • Lingling Zhou
  • Xiaolei Wu

Detail(s)

Original languageEnglish
Pages (from-to)12-17
Journal / PublicationMaterials Research Letters
Volume7
Issue number1
Online published19 Nov 2018
Publication statusPublished - 2019
Externally publishedYes

Link(s)

Abstract

Nanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon after yielding, converting the shear band into a localized strain zone (LSZ). Synergistic work hardening was developed in the LSZ by regaining dislocation hardening capability, and by back-stress hardening from the strain gradients in the axial and depth directions, which helped with enhancing global ductility.

Research Area(s)

  • back-stress hardening, ductility, Gradient structure, shear band, strain delocalization

Citation Format(s)

Ductility by shear band delocalization in the nano-layer of gradient structure. / Yuan, Fuping; Yan, Dingshun; Sun, Jiangda et al.
In: Materials Research Letters, Vol. 7, No. 1, 2019, p. 12-17.

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

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