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

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

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1331-1338
Number of pages8
JournalJournal of Materials Research
Volume22
Issue number5
DOIs
Publication statusPublished - 2007 May
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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