Effect of filler metal thickness on creep for stainless steel platefin structure

The finite element(FE)creep analysis of stainless steel plate-fin structure was performed by FE-program ABAQUS. The focus was placed on the effect of filler metal thickness on creep strain.The results show that the filler metal thickness has great effect on creep at elevated temperature.The complex residual stress was generated in the plate-fin structure due to the material mismatching between base metal and filler metal.The residual stress was changed with the filler metal thickness changing, which causes the creep change.In the filler metal, the brazed residual stress is decreased with the filler thickness increasing, which leads to the creep strain decreasing.In the fin, the filler metal thickness has little effect on creep strain because the brazed residual stress is not affected by filler metal thickness.In the plate, the creep strain is decreased due to the brazed residual stress decreasing with filler metal increasing.This work provides a reference for the high temperature strength design of stainless steel plate-fin structure.