Evaluation of grain boundary effect on the strength of Fe-C martensltic steels through nanoindentation technique

T. Ohmura, K. Tsuzaki

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

Nanoindentation measurements were performed for Fe-C based martensitic steels, and then the strengthening factors such as grain boundary effect were evaluated. Nanohardness of the matrix of the martensite is lower than that expected from macroscopic hardness, indicating that the grain boundary effect is significant for the macroscopic strength of the Fe-C martensite. A remarkable decrease of the grain boundary effect was found at the tempering temperature of 673 K, which is due to a disappearance of film-like carbides on grain boundaries. These results will be discussed in light of the interpretations of grain boundary strengthening.

Original languageEnglish
Pages (from-to)4113-4116
Number of pages4
JournalMaterials Science Forum
Volume475-479
Issue numberV
DOIs
Publication statusPublished - Jan 1 2005
EventPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China
Duration: Nov 2 2004Nov 5 2004

All Science Journal Classification (ASJC) codes

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

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