|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Friction Stir Processing of 304L Stainless Steel for Crack Repair
||Michael Miles, Cameron Gunter, Fengchao Liu, Tracy Nelson
|On-Site Speaker (Planned)
A dilemma facing the nuclear industry is weld repair in stainless steel components that have been irradiated over many years. When conventional fusion welding is used, the high temperatures and thermal stresses inherent in the process enhance the growth of helium bubbles, causing intergranular cracking in the heat-affected zone (HAZ). Friction stir processing (FSP) has potential as a weld repair technique for irradiated stainless steel, because it operates at much lower temperatures than fusion welding. A numerical simulation of the FSP process in 304L stainless steel was performed in order to calculate temperatures and strain rates in the stir zone. The model employed an Eulerian finite element approach, where flow stresses for the large range of strain rates and temperatures inherent in the FSP process were provided by JMatPro. Steady-state temperatures and strain rates from the model were used to predict recrystallized grain size in the processed 304L material.
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