In-situ observations of fracture processes in 0.6 μm and 9.5 μm SiCP/6061Al composites

Lihe Qian, Hiroyuki Toda, Shigeki Morita, Toshiro Kobayashi, Zhong Guang Wang

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

In-situ SEM observations of fracture processes in two 6061 AI alloy composites reinforced with coarse and fine SiC particles, respectively, were carried out to clarify their fracture mechanisms. It was found that in the coarse particle reinforced composite, voids were formed in the matrix around SiC particles ahead of the main crack tip, then coalesced with each other, and finally connected with the main crack tip, causing propagation of the main crack. However, in the fine particle reinforced composite, multiple micro-cracks were formed at the boundaries between SiC particle clusters and surrounding matrix or within the clusters, then connected with each other, and finally joined with the main crack tip, leading to crack branching and growth of the main crack. Crack branching, multiple cracking and crack deflection were proposed to contribute to the enhanced fracture toughness in the fine particle reinforced composite compared with the coarse particle reinforced composite.

本文言語英語
ページ(範囲)34-41
ページ数8
ジャーナルMaterials Transactions
46
1
DOI
出版ステータス出版済み - 1月 2005
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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