Effects of pore morphology on fatigue strength and fracture surface of lotus-type porous copper

H. Seki, M. Tane, M. Otsuka, H. Nakajima

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We studied the effect of anisotropic pore morphology on the fatigue behavior and fracture surface of lotus-type porous copper, which was fabricated through unidirectional solidification in pressurized hydrogen and argon atmospheres. The fatigue strength at finite life is closely related to the pore morphology. The fatigue strength decreases with increasing porosity, and the strength depends on applied-stress direction. The fatigue life is the longest in the direction parallel to the longitudinal axis of cylindrical pores. The fatigue strength at finite life is proportional to the ultimate tensile strength and can be expressed by a simple power-law formula. Anisotropic pores affect the fracture surface of lotus copper; crack-initiation site depends on applied-stress direction, and the anisotropic shape pores affect the direction of crack propagation and final fracture surface.

本文言語English
ページ(範囲)1331-1338
ページ数8
ジャーナルJournal of Materials Research
22
5
DOI
出版ステータスPublished - 2007 5
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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