Single Vee and Double Vee Butt Welds in 1 Inch Homogeneous Armor

摘要

To determine and compare the resistance to penetration and the resistance to impact of a single vee and a double vee butt joint in 1 inch homogeneous armor plate welded with the bevels preclad with 25/20, a filler metal of 25/20, and a hard facing electrode on the surface layers. The resistance to penetration of the single vee butt joint and the double vee butt is approximately the same; there being but 6 f/s difference in the maximum resistance of the two joint fired at with .50 cal. A.P. ammunition. The ballistic limit obtained was 2619 f/s for a single vee joint and 2625 f/s for a double vee joint. The resistance to shock of the single vee and double vee butt joints in this test could not be definitely determined because the homogeneous armor (Brinell 444) shattered, leaving the weld intact.