Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel

S. Araki, K. Mashima, T. Masumura, T. Tsuchiyama, Setsuo Takaki, T. Ohmura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The critical shear stress for dislocation emission at grain boundary was directly measured by nanoindentation technique. The change in the grain boundary strength with low-temperature aging was then discussed. It was found that the critical grain boundary shear stress increased, and the increment was correlated to the amount of carbon segregated at the grain boundary. From the relationship between the lower yield point and the amount of segregated carbon, it was concluded that the Hall–Petch coefficient (ky) increased with grain boundary segregation. The validity of the pile-up theory explaining ky, which depends on the grain boundary strength, was demonstrated.

Original languageEnglish
Pages (from-to)38-41
Number of pages4
JournalScripta Materialia
Volume169
DOIs
Publication statusPublished - Aug 1 2019

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel'. Together they form a unique fingerprint.

Cite this