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Performance assessment of the (Trans)Varestraint tests for determining solidification cracking susceptibility when using welding processes with filler metal

2004; IOP Publishing; Volume: 15; Issue: 11 Linguagem: Inglês

10.1088/0957-0233/15/11/006

1361-6501

Celina Leal Mendes da Silva, Américo Scotti,

Non-Destructive Testing Techniques

This work is aimed at verifying if the Varestraint and Transvarestraint tests are adequate to assess solidification cracking susceptibility in welding of aluminium when a process with filler metal is employed. The main goal was to compare the performance of a reasonably new process (double pulsed GMAW) for welding aluminium alloys. Both tests and three cracking quantification criteria were analysed and compared to determine which was the most robust and reliable. The results showed that the most adequate ones were the Transvarestraint test and the maximum cracking length criterion. Some steps must be taken so as to guarantee reliability of the results if a small number of experiments are expected. The application of this methodology in comparison between a conventional pulsed GMAW and a double pulsed GMAW still showed that the latter reduces cracking susceptibility, appearing as an alternative solution for this critical phenomenon in aluminium welding.