ASM Failure Analysis Case Histories: Processing Errors and Defects
Intergranular Cracking in an Air Bottle Because of Torch Overheating Before Welding
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Published:2019
Abstract
An air bottle, machined from a solid block of aluminum alloy 2219-T852, displayed liquid-penetrant crack indications after assembly welding. The air bottle was machined to rough shape, a 3.8 mm (0.15 in.) wall thickness cylindrical cup with a 19 mm (3/4 in.) wall thickness integral boss on one side. After annealing, hot spinning, annealing a second time, and tack welding a port fitting, the assembly was torch preheated to 120 to 150 deg C (250 to 300 deg F). The port fitting was then welded in place. Final full heat treatment to the T62 temper was followed by machining,...
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Member Sign InIntergranular Cracking in an Air Bottle Because of Torch Overheating Before Welding, ASM Failure Analysis Case Histories: Processing Errors and Defects, ASM International, 2019, https://doi.org/10.31399/asm.fach.process.c0047632
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