Weld Repair of Irradiated Materials [PowerPoint presentation]

Summary: • A welding cubicle has been constructed for use in the development of weld repair technologies for highly irradiated materials. • Laser welding system utilizes an auxiliary beam stress improvement (ABSI) configuration that has been optimized through computational modeling and validated through experimental testing to reduce stresses near the weld zone. • An artificial neural network has been used to monitor process variables during friction stir welding to detect conditions associated with tool wear that lead to the formation of weld defects. • Laser welding tests are about to begin on irradiated stainless steel of 5, 10 and 20 wppm B doped 304 L. • Over the next few months continued development and testing of laser and friction stir welding parameters for irradiated 304 L, 316 L and alloy 182 of varying He content. • Ongoing work includes the characterization of the unirradiated, irradiated and post weld materials. • Future work explore the effects of re irradiation on weld repaired materials