Study of GTAW and CO2 LBW Parameters on Mechanical and Corrosion Properties of Cupronickel Cu Ni Alloys

Abstract

quotPresently, welding of 90/10 and 70/30 Cu-Ni alloys in ship building industries can newlinebe performed adequately only by GTAW which uses ER Cu-Ni 70/30 filler wire. Earlier newlineinvestigations explained on CC GTAW of 70º-80º single V butt 90/10 Cu-Ni alloys welds newlinerevealed excessive grain size in FZ and HAZ. This large grain size tends to promote newlineductility-dip cracking, distortion, hot cracking sensitivity, increase in width of HAZ and newlineresidual stresses. Because of the above mentioned problems, CC GTAW of Cupronickel newlinealloy welds exhibits inferior mechanical properties.quot newline newline