Fatigue Characteristics of Plain and Notched Specimens of SiC-Whisker-reinforced Aluminum Alloy in Comparison with Aluminum Alloy

Hiroshi Noguchi, Hironobu Nisitani, Yun Hae Kim, Akio Nishizawa

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1 Citation (Scopus)

Abstract

In this paper, rotating-bending fatigue tests of the SiC-whisker-reinforced 6061-T6 aluminum alloy and 6061-T6 aluminum alloy made by powder metallurgy were carried out to investigate the fatigue characteristics of plain and notched specimens at room temperature. The fatigue mechanisms in both materials were clarified through successive surface observations using the plastic replica method. In the case of the SiC-whisker-reinforced composites, there are whisker rich and poor zones and the fatigue crack is nucleated from the end of whiskers near the boundary. On the other hand, in the case of the aluminum alloy, the fatigue crack is nucleated from defects and propagates by shear. Moreover, the results were discussed based on linear notch mechanics.

Original languageEnglish
Pages (from-to)1765-1771
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume58
Issue number554
DOIs
Publication statusPublished - 1992

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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