Influence of simulated high- G on the weld size of aL–lI alloy

Whether welding processes are used on earth or in space, they have the same objective: to obtain defect-free welds. To fully understand the effect of gravity on the weld pool geometry and solidification one should perform experiments within a broad range of gravitational acceleration. High-gravity a...

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Bibliographic Details
Published in:Acta astronautica 2001-01, Vol.48 (2), p.153-156
Main Author: Aidun, Daryush K
Format: Article
Language:English
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Summary:Whether welding processes are used on earth or in space, they have the same objective: to obtain defect-free welds. To fully understand the effect of gravity on the weld pool geometry and solidification one should perform experiments within a broad range of gravitational acceleration. High-gravity arc welding experiments were done on Al–Li alloy using the centrifuge called Multi-Gravity Research Welding System (MGRWS). At a high “ g” level, buoyancy-driven flow is the dominant force in the weld pool over the Marangoni and the electromagnetic forces. Preliminary results show that the average grain size in the fusion zone at 1 g is smaller that at 5 g.
ISSN:0094-5765
1879-2030
DOI:10.1016/S0094-5765(00)00151-X