Materials Science. Non-Equilibrium Phase Transformations.
Vol. 10 (2024), Issue 1, pg(s) 26-29

On the character of rate primary recrystallization of steels in the zone of laser action

Abstract

The features of high-speed primary recrystallization of the cold-worked steels with different chemical composition and structure in the laser impact zone are studied. It has been established that during laser heating of the cold-formed steels, either polygonization or primary recrystallization occurs, which has a dynamic character. It is shown that the range of degrees of cold rolling, at which the character of structure recovery changes from polygonization to recrystallization, increases from 25…30 to 50…60%. The effect of heredity of the cold deformation substructure is revealed. It has been found that the density of dislocations in the surface layer after laser exposure increases by more than an order of magnitude due to plastic shears that introduce forest dislocations. It is shown that in the zone of laser treatment there are signs of columnarity of recrystallized grains and subboundaries, as well as a crystallographic texture.

Keywords

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