Three-dimensional crack initiation behavior of cast aluminum alloy under low-cycle fatigue

Osamu Kuwazuru, Keigo Matsumura, Vinicius Aguiar De Souza, Masakazu Kobayashi, Hiroyuki Toda

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)


The crack initiation mechanism of cast aluminum alloy was addressed to quantitatively evaluate the fatigue strength. We employed the synchrotron radiation microtomography to visualize the three-dimensional damages around pores and silicon particles. Two types of specimens underwent a low-cycle fatigue test. The temperature of solution treatment was different, and it yielded a difference in the shape, size and distribution of silicon particles. After a certain cycles of fatigue, a catastrophic damage around many silicon particles occurred, and they connected to each other so as to form a crack especially within the high stressed region around a relatively large pore. The scanning electron microscopy after the test showed that the type of damage was the breakage of long-shaped silicon particles or the aluminum-silicon interface debonding of round silicon particles. The high temperature solution treatment facilitated the interface debonding by the enlargement of silicon particles.

ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
出版ステータス出版済み - 2014

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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