Matrix strength evaluation of ultra-fine grained steel by nanoindentation

T. Ohmura, K. Tsuzaki, N. Tsuji, N. Kamikawa

研究成果: ジャーナルへの寄稿学術誌査読

10 被引用数 (Scopus)

抄録

Nanoindentation was performed to evaluate the matrix strength of the ultra-fine grained steel produced by accumulative roll-bonding and subsequently annealed. The nanohardness, associated with the matrix strength, decreases with increasing annealing temperature. Because the matrix strength corresponds to the first term σ0 of the Hall-Petch relation, this result suggests that the σ0 might not be constant for these steels between various grain sizes. Therefore, it is suggested that the change of the macroscopic strength during annealing is dominated by not only the grain coarsening leading to a reduction of grain refinement strengthening, but also the softening of the matrix strength.

本文言語英語
ページ(範囲)347-350
ページ数4
ジャーナルJournal of Materials Research
19
1
DOI
出版ステータス出版済み - 1月 2004
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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