Causes of cracking aluminum 3003 joints by GMAW
Keywords:
failure, cracking, aluminum alloys, GMAW welding.Abstract
A frequent problem, whose solution requires a scientific approach due to its phenomenological essence, is cracking in aluminum joints. The causes of cracking in 3003 aluminum joints by GMAW (gas metal arc welding) are defined in this research. The study was carried out on actual joints in a food product container. A refrigerated disk was used for extracting the sample, trying not to alter the material to maintain evidence of possible causes of failure. Macrograph of the welded joints, and visual inspection, chemical analysis by optical emission spectrometry, stress testing of base material analyzes were performed to the joint sample. We conclude that the lack of fusion and penetration is the cause of cracking, which act as stress concentrations and they were originated by deficiencies when carrying out welding.Downloads
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