Unique defect evolution during the plastic deformation of a metal matrix composite

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

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Author(s)

  • Yanfang Liu
  • Fang Wang
  • Yang Cao
  • Jinfeng Nie
  • Hao Zhou
  • Huabing Yang
  • Xiangfa Liu
  • Xianghai An
  • Xiaozhou Liao
  • Yonghao Zhao

Detail(s)

Original languageEnglish
Pages (from-to)316-320
Journal / PublicationScripta Materialia
Volume162
Online published24 Nov 2018
Publication statusPublished - 15 Mar 2019
Externally publishedYes

Abstract

During the plastic deformation of a metal matrix composite (MMC) containing non-deformable particles, high dislocation density and strong back stresses are expected because the particles help with blocking and accumulating dislocations. Here we report that the MMC has lower, instead of higher, dislocation density than the corresponding monolithic matrix material when they are deformed to high plastic strains, because smaller sub-grains in the MMC lowered dislocation generation rate and meanwhile promoted the dislocation interaction and annihilation in the matrix. This unique defect density evolution is a hitherto unknown but important factor affecting the mechanical properties of MMCs.

Research Area(s)

  • Composite, Dislocation density, Microstructure, Plastic deformation, Strain-hardening

Citation Format(s)

Unique defect evolution during the plastic deformation of a metal matrix composite. / Liu, Yanfang; Wang, Fang; Cao, Yang et al.
In: Scripta Materialia, Vol. 162, 15.03.2019, p. 316-320.

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