Dual-focus technique for high-power Nd:YAG laser welding of aluminum alloys

Takakuni Iwase; Hiroki Sakamoto; Kimihiro Shibata; Bernd Hohenberger; Friedrich Dausinger

doi:10.1117/12.377042

7 February 2000 Dual-focus technique for high-power Nd:YAG laser welding of aluminum alloys

Takakuni Iwase, Hiroki Sakamoto, Kimihiro Shibata, Bernd Hohenberger, Friedrich Dausinger

Proceedings Volume 3888, High-Power Lasers in Manufacturing; (2000) https://doi.org/10.1117/12.377042
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

In order to apply aluminum alloys to structural components, they should be joined with sufficient strength and quality as high welding speed as possible. High-power laser welding is expected to achieve much higher productivity than conventional joining techniques. Welding of aluminum alloys was performed using 2-kW and 3-kW continuous wave Nd:YAG lasers. Two beams were delivered by optical cables 0.6 mm in diameter and focused on the surface of the specimens as dual spots. Overlap joints of 2-mm-thick sheets were made at various welding parameters, including beam distance, beam arrangement and welding speed. The quality of the bead, including its appearance and macrostructure, and the tensile strength of the joints were investigated. At a shorter beam distance of 0.36 mm, the weld bead surface was humped, making it unacceptable in terms of quality. Sound weld beads were obtained at beam distances of 0.6 mm and 1.0 mm. As the beam distance was increased, the weld depth became shallower. At a beam distance of 1.0 mm, the weld area was too small to provide sufficient strength.

Citation Download Citation

Takakuni Iwase, Hiroki Sakamoto, Kimihiro Shibata, Bernd Hohenberger, and Friedrich Dausinger "Dual-focus technique for high-power Nd:YAG laser welding of aluminum alloys", Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); https://doi.org/10.1117/12.377042

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available