The study was designed to evaluate the Weldability of materials and to investigate methods of minimizing weld porosity in such materials as oxygen-free (Alloy 102), boron-deoxidized (Alloy 109), and deoxidized low phosphorus (Alloy 120) copper. Square-butt, fully penetrated welds were made using flat, 0.024- and 0.030-inch thick coupons. In pressurized gas tungsten-arc welding, the variables were chamber pressure, number of welding passes, and type of shielding gas. In the second process, electron-beam welding, only the numbers of passes were varied.
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