Anisotropic fusion profile and joint strength of lotus-type porous magnesium by laser welding

Taichi Murakami, Takuya Tsumura, Teruyuki Ikeda, Hideo Nakajima, Kazuhiro Nakata

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The effect of pore growth direction on the weld fusion zone profile and the mechanical property of lotus-type porous magnesium joints were investigated by laser welding through experiments and numerical simulations. The dependencies of the pore growth direction on the weld fusion zone profile were evaluated on the basis of the temperature distribution calculated using the ABAQUS FE code with user subroutines. The calculated weld fusion zone profiles were in good agreement with the experimental results, thereby suggesting that thermal conductivity affects weld fusion zone profiles significantly. Moreover, the effect of pore growth direction on the joint strength of lotus-type porous magnesium was investigated. The anisotropy of the tensile strength of the lotus-type porous magnesium with regard to the pore growth direction was observed. The joints with pores parallel and perpendicular to the tensile direction were fractured at the fusion boundary and the base metal, respectively.

Original languageEnglish
Pages (from-to)278-285
Number of pages8
JournalMaterials Science and Engineering A
Volume456
Issue number1-2
DOIs
Publication statusPublished - 2007 May 15
Externally publishedYes

Keywords

  • Hydrogen
  • Laser welding
  • Mechanical property
  • Numerical simulation
  • Porous magnesium
  • Solidification

ASJC Scopus subject areas

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

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