Laser beam Induced Structural Changes in Multicomponent Nickels Alloys

Multicomponent nickel alloy, alloyed with: Mn, Cr, Al, Fe, B, Zr and others, was subjected after mechanical under the vacuum heat treatments: solution heat treatment at 1080oC for 1 hour, primary precipitation at 840 oC for 4 hours, secondary precipitation heat treatment at 760 oC for 3 hours and stress relief annealing at 700 oC for 1 hour. After heat treatment, laser surface treatment was applied and was related to the material deformation and damage formation on the material surface. Preliminary investigations were carried out by laser drilling and resulting traces on material were recorded by scanning electron microscope to find out the influence of different energies and pulse length on structural changes in the material