Open AccessThe role of local plastic deformation in the formation of structure and properties of materials under extreme heating
Author(s) -
А. В. Бровер,
Г. И. Бровер,
Olga Moysova
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/680/1/012019
Subject(s) - materials science , recrystallization (geology) , hardening (computing) , dissipation , martensite , severe plastic deformation , composite material , thermal , deformation (meteorology) , laser , metallurgy , microstructure , thermodynamics , optics , geology , paleontology , physics , layer (electronics)
Based on the physical processes analysis in the areas of pulsed laser applied on metals, the research reveals the peculiarities in self-organization of the structure, which leads to the formation of non-trivial properties of surface layers. Structural features of the hardening process during high-speed laser processing depend on the resulting level of strains in the processing zones, that is, on the ratio of plastic deformation processes during heating under the influence of thermal and phase strains and energy dissipation by polygonization and recrystallization. As a result, the effect of material strengthening is achieved not only by martensitic transformation, microchemical heterogeneity, but also by high-temperature riveting, increasing the density of crystal structure defects, plastic shifts under the strain of different nature.