Surface integrity is very important to the service performance and lifespan of parts,but research of the microstructure evolution mechanism of single crystal superalloy during machining is still lacking.The grinding force and temperature of single crystal superalloy were collected,and the microstructure changes and microhardness on the grinding subsurface were characterized.The characteristics of the white layer were studied as well.The results showed that in the range of test parameters,the grinding force and temperature increase remarkably with the grinding depth increasing,and the thickness of the white layer and the plastic deformation layer increases with the increase of grinding depth and feed speed.The element diffusion is found between the white layer and the plastic deformation layer,resulting in rich Al and Ta elements in the white layer.The surface microhardness increases after grinding,and the hardening degree rises with the increase of grinding depth and feed speed.
Ni-based single crystal superalloygrindingwhite layerelement diffusionwork hardening
维普
万方数据
