Effects of time interval in rapid prototyping of Al-alloy based on welding

In the process of rapid prototyping based on welding, heat input has great effect on the quality and capability of workpieces. Time interval of deposited layers is used as a method of controlling the heat input in rapid prototyping process of 5356 Al-alloy based on AC gas tungsten arcwelding (AC-GTAW).Under the condition of various time interval of deposited layers, the surface morphologies and microstructures of deposited layers are better than that in equal time interval of deposited layers.