Abstract
Within the framework of this study, examinations and tests were conducted on rolled plates 20 and 76 mm thick made of extra low interstitial TA6V (Ti-6Al-4V) alloy, type α + β and 621 Mo (Ti-6Al-2Nb-1Ta-1Mo) type α. These alloys were developed in the U.S.A. for applications in marine environments. The various fusion welding processes tested were tungsten inert gas (TIG), metal inert gas (MIG), plasma and electron beam welding. Provided the edges were properly prepared and the joint was adequately protected during the welding operations, neither grade studied presented any particular problems in any of the processes. The internal integrity of the weld was satisfactory. The welded joints were submitted to tensile, compression, crack propagation and stress corrosion tests; no latent anomalies were reported.
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