Fatigue crack growth resistance in Ni-base super alloy

K. Morino, N. Kawagoishi, Q. Chen, Y. Matsuyama, Y. Nakamura

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)


Rotating bending fatigue tests were carried out to investigate the influence of grain size on the resistance to crack growth of Ni-base super alloy, Inconel 718, using the materials with grain sizes of about 20, 50,100 and 200 μ, at room temperature. The larger grain size, the smaller crack growth rate, though the static strength was decreased with increase in grain size. The growth rate of a small crack was uniquely determined by the term σan (Small crack growth law), where σ a and a are the stress amplitude and the crack length, respectively, and n is a constant. The resistance to crack growth among materials was evaluated based on the law and showed a good correlation with tensile strength σB, meaning that fatigue life can be predicted by using only σB.

ジャーナルKey Engineering Materials
出版ステータス出版済み - 2007

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 材料力学
  • 機械工学


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