Physics

Simulation of the interaction of atomic displacement cascades with chromium-enriched precipitates in the FeCr alloy

V. V. Svetukhin, M. Yu. Tikhonchev

Ulyanovsk State University, Ulyanovsk

Abstract: The article is devoted to simulation of atomic displacement cascades in Fe-9at.$\%$Cr alloy containing Chromium enriched precipitates. Simulation was performed by molecular dynamics method. Initial crystal temperature was 300 K and primary knock-on atom (PKA) energies were 15 and 20 keV. The authors considered spherical precipitates of 1 and 5 nm of diameter containing 95at.$\%$ of chromium and studied the features of cascade development near chromium enriched precipitates. The researchers revealed the tendency of such precipitates to dissolve in matrix under cascade, however the form and composition of 5 nm precipitates changes insignificantly. Therefore they are considered to be stable. Parameters of small 1 nm precipitates change significantly, sometimes they dissolve entirely.

Keywords: FeCr alloy, molecular dynamics method, atomic displacement cascade, chromium enriched precipitate, dissolution.

UDC: 621.039.531.001.57