Laser Beam Welding of Automobile Materials for Lightweight Car Body

Akio Hirose; Kojiro F. Kobayashi

doi:10.4028/www.scientific.net/MSF.502.487

Paper Titles

Microstructure of SiC / TiAl Interface Formed by Solid-State Diffusion Bonding
p.461

Comparative Study on Microstructure and Strength of TiAl/Steel Joints Brazed with Ag-Cu-Ti and Ag-Cu-Zn Filler Metals
p.467

Al₂O₃/Al₂O₃ Joints Brazed with Composite Active Filler Materials Obtained by Mechanical Alloying
p.473

Laser Weldability of Aluminum Alloy and Steel
p.481

Laser Beam Welding of Automobile Materials for Lightweight Car Body
p.487

Diode Laser Brazing of Heat-Resistant Alloys Using Tandem Beam
p.493

Analysis of Laser Fusion Zone of Lotus-Type Porous Metals by 3-Dimensional FEM
p.499

Improvement of Solution Type Plasma Spraying Process
p.505

Performance of Thick TiN Composite Coating as High Heat Resistant TBC
p.511

HomeMaterials Science ForumMaterials Science Forum Vol. 502Laser Beam Welding of Automobile Materials for...

Laser Beam Welding of Automobile Materials for Lightweight Car Body

Abstract:

This paper presents laser beam welding (LBW) of an age-hardened aluminum alloy and a bake-hardening (BH) steel, which are promising materials for lightweight car body, compared with conventional arc welding. The LBW of the aluminum alloy had a significantly narrower fusion zone and heat affected zone (HAZ) than the arc weld and the hardness of the softened zones was almost completely recovered to the base metal hardness after a post weld aging treatment. This advantage of LBW is due to a low overall heat input resulting from its high energy density. This is also beneficial for welding of the BH steel. In the LBW of the pre-strained BH steel, both the fusion zone and HAZ were bake-hardened after a heat-treatment and the fracture occurred in the base metal in the tensile test. In contrast to this, the arc weld had a large softened zone in the HAZ and fractures in this region.

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Periodical:

Materials Science Forum (Volume 502)

Pages:

487-492

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.502.487

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Online since:

December 2005

Authors:

Akio Hirose, Kojiro F. Kobayashi

Keywords:

Age-Hardened Aluminum Alloy, Automobile Materials, Bake-Hardening Steel, Joint Strength, Laser Beam Welding

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