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Proceedings Paper

Fan-shaped cracking test of aluminum alloys in laser welding
Author(s): Muneharu Kutsuna; Keiichiro Shido; Takeshi Okada
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Paper Abstract

Laser welding process of aluminum alloys are recognized as an important producting system increasingly recently in automobile and electronics industries. However, even if the alloy is welded in the proper welding condition, depending on an alloy, weld defects, such as a solidification crack and porosity, occur, and it has been a problem. In the present work, the Fan-shaped solidification crack test method was investigated to evaluate the crack susceptibility of the alloy and to solve the problem. The solidification crack, which occurs in bead-on-plate, welding at an angle to the edge of the specimen, and spread in various aluminum alloy welds from the start of bead evaluation of solidification crack susceptibility was tried by measuring the crack length. Moreover, the same experiment was conducted using the adaptive mirror, which the focal point is changed by 0 to 1000 Hz in the beam direction. By oscillating the focal point of laser beam, weld pool and keyhole were stabilized and it result in reducing solidification crack susceptibility.

Paper Details

Date Published: 3 March 2003
PDF: 5 pages
Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); doi: 10.1117/12.497901
Show Author Affiliations
Muneharu Kutsuna, Nagoya Univ. (Japan)
Keiichiro Shido, Nagoya Univ. (Japan)
Takeshi Okada, Sumitomo Electric Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 4831:
First International Symposium on High-Power Laser Macroprocessing
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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