CHANGES IN THE CRYSTAL STRUCTURE OF METALS IN THE COURSE OF THEIR LASER PROCESSING

By the x-ray diff ractometry method, the authors found a change in the crystal structure of a number of metals in the zone of exposure of their surface to laser radiation with a fl ux density of 10⁴ –10⁵ W/cm² . It has been shown that on exposure of the surface of metal samples to laser radiation, their crystal structure changes, in the exposed zone, from the equilibrium structure to a distorted one (having the shape of a parallelepiped, which is diff erent from a cube). A relationship has been assumed between the disclosed eff ect and the occurrence of considerable microstresses in the zone of rapid anisotropic heating of metals
   
Author:  S. V. Vasil′ev ,  N. G. Val′ko ,  A. Yu. Ivanov ,  A. L. Sitkevich
Keywords:  laser radiation, x-ray diff ractometry, change in the crystal structure, correlation function.
Page:  821