Simulation of interaction of edge dislocations with radiation defects in Fe-10Cr alloy

AV Korchuganov and KP Zolnikov and DS Kryzhevich, 6TH INTERNATIONAL CONGRESS ENERGY FLUXES AND RADIATION EFFECTS, 1115, 052032 (2018).

DOI: 10.1088/1742-6596/1115/5/052032

The interaction of edge dislocations with radiation-damaged regions and mobility of dislocation loops in Fe-10Cr alloy is studied. Calculations are carried out in the framework of the molecular dynamics method. Dislocation loops formed as a result of ion irradiation of the sample free surface and straight dislocations in the bulk of the material were considered. It is found that the size, direction of the Burgers vector, and the distance to the free surface significantly affect the mobility of dislocation loops. As a rule, only dislocation loops of small length escape to the free surface. It is shown that <100> dislocations are almost immobile at 300 K and begin to escape to free surface after heating the sample to 600 K. An increase of radiation induced defect concentration leads to an increase in the threshold shear stress at which the edge dislocations begin to slip.

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