Year
2015
Abstract
Influence of neutron irradiation on radiation swelling of aluminum alloys of two types: 97.8Al+0.9Mg+0.8Cu and 96.8Al+2.4Mg+0.3Cu, samples which had right forms: parallelepiped, cylinder and disk were studied. The samples were irradiated with fast neutrons in vertical channels of WWR-SM research reactor of INP AS RU (fluences of 1.3·1018, 1.5·1019and 1.2·1020 n/cm2). It was discovered, that irradiation leads to the change of linear dimensions of samples and corresponding radiation swelling. Relative volume change of samples was calculated and concentration of excess vacancies, generated by fast neutrons, was assessed. Mechanism, limiting maximum size of pores in irradiated samples, conditioned by surface tension is offered. It was presented, that in wide range of fluences of fast neutrons super-linear dependence of swelling of samples from dose was observed. Observed deviation from linear dependence could be caused by deposit of interstitial atoms.