Evaluation of matrix strength in ultra-fine grained pure Al by nanoindentation

Ling Zhang, Takahito Ohmura, Satoshi Emura, Nobuaki Sekido, Fuxing Yin, Xiaohua Min, Kaneaki Tsuzaki

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Abstract Nanoindentation measurements of the grain interiors of an ultra-fine grained (UFG) pure Al produced by equal channel angular pressing were taken to evaluate the contribution of the matrix strength. Specimens were subjected to 0, 1, 2, 4, and 8 passes at ambient temperature. The nanohardness of the deformed samples was always higher than that of the undeformed sample OP in the range of the indentation depth that was investigated, suggesting a strengthening of the matrix in the UFG Al. The increase in hardness that was contributed by the matrix to the macroscopic scale hardness was significantly large in about 40% of the deformed samples. The microstructural characterization and the deformation response analysis with the pop-in event during indentation suggested that the strengthening of the matrix originated from dislocation strengthening and some other presumable factors in the grain interiors.

本文言語英語
ページ(範囲)2917-2923
ページ数7
ジャーナルJournal of Materials Research
24
9
DOI
出版ステータス出版済み - 9 2009

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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