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A novel gas tungsten arc welding (GTAW) assisted hybrid ultrasonic seam welding MgAZ31B and Al6061 alloy sheets with satisfactory joint strength were successfully achieved using a previous GTAW preheating heat source. The preceding GTAW reduced the sheet hardness but enhanced the acoustic softening effect and materials plasticity. Therefore, the direct joining of 1mm thick MgAZ31B and Al6061 alloy...
Cold metal transfer (CMT) is a modified metal inert gas welding process based on short-circuiting transfer process, characterised by low heat input and no-spatter welding. The wave control characteristics and its droplet transfer process were analyzed by sensing and image method. The results show that it can realize no-spatter welding and low heat input during welding process. When welding thin sheets,...
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