TIG and MIG welding of 6061 and 7020 aluminium alloys. Microstructural studies and mechanical properties
DOI:
https://doi.org/10.3989/revmetalm.1998.v34.iExtra.753Keywords:
Aluminium alloys, Welding, Microstructure, Mechanical propertiesAbstract
The aluminium alloys of the 6XXX and 7XXX series, are actually considered of medium and high strength, and are been profusely used in different industries such as aeronautical, automotive, etc. However, its wide application as structural material needs of the proper development of their joining process. The present work describes the results obtained from the microstructural evaluation, both with optical and scanning electronic microscopies (OM and SEM), and of the mechanical one (hardness changes) of the weld produced in the alloys using two different are welding techniques: GTAW (TIG) and GMAW (MIG). For the last one, a filler metal with a composition of Al-5Mg, AWS denomination A5.10-92 (AA5356), has been used.
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