Effect of Microstructures on Low-Cycle Fatigue Properties and Surface Crack Propagation Behavior in Ductile Cast Irons

Yasuo Ochi, Akira Ishii, Shigemi Sasaki, Yoshiyuki Sakaguchi, Masanobu Kubota

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Total-strain controlled low-cycle fatigue tests were carried out at room temperature on three kinds of ductile cast iron (ferritic ductile iron; FDI, pearlite-ferritic ductile iron; P-FDI, and pearlitic ductile iron; PDI) of round bar-type specimens with a small drilled notch. Fatigue deformation properties such as stress amplitude, plastic strain and cyclic stress-strain curve were measured, and the relationship between the strain amplitude and the fatigue life was investigated in the three cast irons. Propagation behavior of the surface fatigue crack initiated from the small notch was observed in detail at the surface. The fracture surface, the effects of graphite distribution and base microstructure on the crack growth behavior were investigated experimentally. The surface crack propagation rate da/dN was evaluated in the J integral range ΔJ, and the results for these cast irons were compared with the results for other metals.

本文言語英語
ページ(範囲)619-625
ページ数7
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series A
60
571
DOI
出版ステータス出版済み - 1994
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 材料力学
  • 機械工学

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