EVALUATION OF 2014-6061 ALUMINUM ALLOY WELDMENTS, HEAT TREATED AND AGED AFTER WELDING,

Based on test results, the following conclusions were reached For a 99-percent confidence level, the following are the expected design parameters when stops, starts, tacks ground out, and tacks welded over are included 40,000 psi -- 0.05-in. material 36,400 psi -- 0.125-in. material 36,400 psi -- 0.25-in. material Tensile elongations of 7.5 percent are typical for 0.05- and 0.125-in. material however, the minimum elongations are 8.5 percent for 0.25-in. material The recommended heat treatment for the bimetal junction is solution heat treatment at 950 10 deg F with a water quench, followed by an aging treatment at 350 10 deg F for eight hours, and subsequent cooling in air. The soaking times required for various sheet thicknesses are 0.032 in., 20 minutes 0.032-in. but 0.10 in., 45 minutes and 0.10 in., 60 minutes. Author