Evidence of solidification crack propagation in pulsed laser welding of aluminum alloy

Jia, Z. and Zhang, P. and Yu, Z. and Wu, D. and Tian, Y. and Yan, H. (2021) Evidence of solidification crack propagation in pulsed laser welding of aluminum alloy. Optics Express, 29 (12). pp. 18495-18501. ISSN 1094-4087

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Abstract

It is difficult to collect the crack propagation signal under general continuous welding condition due to other signal interference of molten pool. In order to study the effect of residual stress on crack propagation, acoustic emission technology was successfully applied to monitor welding process according to the characteristics of pulsed laser welding. Crack free welding is achieved by reducing the pulse interval to limited the crack size of single pulse welding spot. The welding process was monitored synchronously by high speed photography and acoustic emission, the evidence of crack propagation after solidification of weld is successfully captured.

Item Type:
Journal Article
Journal or Publication Title:
Optics Express
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
155996
Deposited By:
Deposited On:
11 Jun 2021 08:40
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Jul 2021 06:25