Визначення локальних деформацій в околі зварного шва нікелевого сплаву за даними енергетичних Фур’є спектрів картин Кікучі

A discrete two-dimensional Fourier transform and the power Fourier spectrum are used for determination of average strains near cracks in a welded seam of Ni-Cr-Fe alloy. The alignment of Kikuchi images with the help of genetic algorithms and subtraction of white Gaussian noise made it possible to more fully take into account the influence of instrumental factors on the formation of electron backscatter diffraction patterns. Keywords: Ni—Cr—Fe alloy, welded seam, Kikuchi method, Fourier transform, deformation.