The accumulative effect of micro-scale plastic deformation of various frequencies can cause changes of surface microstructure and mechanical properties. Utilizing self-made machine to treat NiCrBSi laser cladding layer; OM to study geometric characteristic of plastic deformation and OM, SEM to observe influence of micro-forging on surface microstructure and cracking behavior of the laser cladding layer. It is shows that high frequency micro-forging can produce plastic deformation of about 150 microns depth onto the surface on NiCrBSi alloy clad and the dendritic crystallization microstructure ...
