Open AccessDetermination of Local Strains in a Neighborhood of Cracks in a Welded Seam of Ni-Cr-Fe According to the Power Fourier Spectrum of Kikuchi Patterns
Author(s) -
M. D. Borcha,
Mykola Solodkyi,
S. V. Balovsyak,
І. М. Фодчук,
A. Kuzmin,
V. M. Tkach,
K. A. Yuschenko,
А. В. Звягинцева
Publication year - 2018
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.19.4.307-312
Subject(s) - fourier transform , white noise , spectral density , welding , diffraction , fourier transform infrared spectroscopy , discrete fourier transform (general) , noise (video) , spectrum (functional analysis) , materials science , power (physics) , electron backscatter diffraction , gaussian , additive white gaussian noise , short time fourier transform , fourier analysis , physics , optics , mathematics , metallurgy , statistics , computer science , mathematical analysis , image (mathematics) , artificial intelligence , quantum mechanics
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.