Prediction of laser fusion zone profile of lotus-type porous metals by 3D heat transfer analysis

Takuya Tsumura, Fuxing Ye, Taichi Murakami, Hideo Nakajima, Kazuhiro Nakata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Lotus-type porous metals, whose pores are aligned in one direction by unidirectional solidification, have a unique combination of properties. These are expected as revolutionary engineering materials with anisotropy of the properties. For the industrial use of the lotus-type porous metals, a reliable joining technology is required. We already reported the melting property of a few lotus-type porous metals by laser welding. These results indicated that these materials possessed anisotropy of melting property with the pore direction perpendicular and parallel to the specimen surface, especially remarkable anisotropy was obtained for the copper specimen owing to the difference of the laser energy absorption to the specimen surface. In this report, the three-dimensional heat transfer analyses, which take into account the difference of the laser energy absorption comparing with the anisotropy of thermal conductivity inherent to lotus-type porous metals, were performed by commercial code with user-defined subroutine. Predicted profile of weld fusion zone is in good agreement with the cross-sectional view obtained by experiments.

Original languageEnglish
Title of host publicationDesigning of Interfacial Structures in Advanced Materials and their Joints - Proceedings of the Int. Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06
PublisherTrans Tech Publications Ltd
Pages307-312
Number of pages6
ISBN (Print)9783908451334
DOIs
Publication statusPublished - 2007 Jan 1
EventInternational Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06 - Osaka, Japan
Duration: 2006 May 182006 May 20

Publication series

NameSolid State Phenomena
Volume127
ISSN (Print)1012-0394

Other

OtherInternational Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06
CountryJapan
CityOsaka
Period06/5/1806/5/20

Keywords

  • Absorptivity
  • Anisotropy
  • Equivalent thermal properties
  • Finite element method
  • Heat transfer analysis
  • Laser welding
  • Lotus-type porous metal

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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