TY - GEN
T1 - Prediction of laser fusion zone profile of lotus-type porous metals by 3D heat transfer analysis
AU - Tsumura, Takuya
AU - Ye, Fuxing
AU - Murakami, Taichi
AU - Nakajima, Hideo
AU - Nakata, Kazuhiro
N1 - Publisher Copyright:
© (2007) Trans Tech Publications, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
KW - Absorptivity
KW - Anisotropy
KW - Equivalent thermal properties
KW - Finite element method
KW - Heat transfer analysis
KW - Laser welding
KW - Lotus-type porous metal
UR - http://www.scopus.com/inward/record.url?scp=84954214007&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84954214007&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/SSP.127.307
DO - 10.4028/www.scientific.net/SSP.127.307
M3 - Conference contribution
AN - SCOPUS:84954214007
SN - 9783908451334
T3 - Solid State Phenomena
SP - 307
EP - 312
BT - Designing of Interfacial Structures in Advanced Materials and their Joints
A2 - Naka, Masaaki
PB - Trans Tech Publications Ltd
T2 - International Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS 2006
Y2 - 18 May 2006 through 20 May 2006
ER -