Nanoindentation study of cementite size and temperature effects in nanocomposite pearlite: A molecular dynamics simulation

Hadi Ghaffarian, Ali Karimi Taheri, Seunghwa Ryu, Keonwook Kang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We carry out molecular dynamics simulations of nanoindentation to investigate the effect of cementite size and temperature on the deformation behavior of nanocomposite pearlite composed of alternating ferrite and cementite layers. We find that, instead of the coherent transmission, dislocation propagates by forming a widespread plastic deformation in cementite layer. We also show that increasing temperature enhances the distribution of plastic strain in the ferrite layer, which reduces the stress acting on the cementite layer. Hence, thickening cementite layer or increasing temperature reduces the likelihood of dislocation propagation through the cementite layer. Our finding sheds a light on the mechanism of dislocation blocking by cementite layer in the pearlite.

Original languageEnglish
Pages (from-to)1015-1025
Number of pages11
JournalCurrent Applied Physics
Volume16
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this