ウイスカ強化金属複合材料の疲労き裂進展特性の評価

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  • Evaluation of fatigue crack growth characteristics of whisker reinforced metals.
  • ウィスカ キョウカ キンゾク フクゴウ ザイリョウ ノ ヒロウ キレツ シンテ

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Fatigue crack growth tests were conducted on whisker-reinforced metal SiC/2025Al over a wide range of fatigue crack growth rates covering the threshold stress intensity factor range AK**. The effects of the whisker volume fraction, orientation and stress ratio on the fatigue crack growth characteristics were investigated on the basis of fracture mechanics and fractography. The whisker reinforcements of the high strength Al alloy were found to be effective in improving the fatigue crack growth resistance, especially the near-threshold stress intensity factor range.

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