Effects of anisotropic pore structure and fiber texture on fatigue properties of lotus-type porous magnesium

H. Seki, M. Tane, H. Nakajima

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We studied the effects of anisotropic pores and fiber texture on the fatigue strength and fracture surface of lotus-type porous magnesium fabricated through unidirectional solidification in pressurized hydrogen and argon atmospheres. The fatigue strength in the direction parallel to the longitudinal axis of pores is higher than that in the perpendicular direction. Not only anisotropic pores but also fiber texture grown along the pore direction contributes to the anisotropy in the fatigue strength. The fatigue strength at finite life of lotus magnesium is closely related to the ultimate tensile strength; the fatigue strength is proportional to the ultimate tensile strength for both loadings parallel and perpendicular to the pore direction. The fracture surface of lotus magnesium is not flat, which originates from porous structure. For parallel loading, fiber texture in lotus magnesium also contributes to the irregular surface, i.e., a combination of texture and pore structure affects fracture surface.

Original languageEnglish
Pages (from-to)3120-3129
Number of pages10
JournalJournal of Materials Research
Volume22
Issue number11
DOIs
Publication statusPublished - 2007 Nov
Externally publishedYes

ASJC Scopus subject areas

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

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