The effect of interstitial carbon on the initiation of plastic deformation of steels

Kaoru Sekido, Takahito Ohmura, Ling Zhang, Toru Hara, Kaneaki Tsuzaki

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Pop-in behavior in nanoindentation was studied as a mechanism for the initiation of plastic deformation in two kinds of steels with different interstitial carbon contents; interstitial free (IF) and ultra low carbon (ULC) steels. The critical load Pc at which the pop-in occurs is higher in ULC than in IF, and the Pc decreases with decreasing loading rate, indicating that the pop-in mechanism is based on a thermal activation process. The interstitial carbon is thought to yield higher friction stress against dislocation movement and have an influence on the critical stress for the activation of the dislocation source formed underneath the indenter.

Original languageEnglish
Pages (from-to)396-401
Number of pages6
JournalMaterials Science and Engineering A
Volume530
Issue number1
DOIs
Publication statusPublished - Dec 15 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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