Influence of reinforcements on solidification microstructure and fatigue properties of cast aluminum alloy composites

Hirofumi Miyahara, Yusaku Maruno, Yoshinori Nishihata, Keisaku Ogi

Research output: Contribution to journalArticle

Abstract

Influences of reinforcements on crystal growth of matrix alloy in cast composites were investigated, and an advantage of reinforcements on rotating bending fatigue belabor were examined. In the composite specimens, the alpha dendrite is deformed during solidification, and the eutectic structure is distributed around fibers. The solutal diffusion field around dendrite tip governs the tip undercooling. The fatigue strength of composites specimens is influenced by the cluster of reinforcement particles rather than the matrix structure. The clusters of particles introduce the cracks but also interrupt the crack propagation. Therefore, reinforcement particles eventually better the fatigue properties of notched specimens.

Original languageEnglish
Pages (from-to)255-261
Number of pages7
JournalTransactions of the Indian Institute of Metals
Volume59
Issue number2
Publication statusPublished - Apr 1 2006

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All Science Journal Classification (ASJC) codes

  • Metals and Alloys

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