Abstract
Framatome has developed an automatic grinding bench to reproduce manual dry grinding applied in workshop. This surface finish operation generally leads to tensile residual stress in welding materials. The current study proposes to investigate the effect of vortex air cooling as an innovative option for the lowering of surface effects induced by dry grinding.Grinding assisted by vortex cooling was tested on AISI 304L and Alloy 690 (UNS N06690). The effect of cooling assistance on microstructural properties of these materials was evaluated using microhardness, XRD residual stress measurements, roughness, SEM & EBSD characterizations. The results suggest that vortex cooling has a lower effect on surface finish parameters of stainless steel 304L than those of alloy 690.
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