Microstructure and properties of copper alloys following 14-mev neutron irradiation

摘要: Abstract The microstructure of copper and three single-phase alloys (Cu-5% Al, Cu-5% Mn, Ni) has been examined following a room-temperature 14-MeV neutron irradiation up to maximum fluence of2× 1021n/m2 (10−3 dpa). produced small defect clusters, many which were resolvable as stacking fault tetrahedra (SFT) or triangle loops. Alloying did not affect the overall cluster density size distribution, but it cause significant reduction in SFT was independent with mean most probable diameter ~ 2.6 1.7 nm, respectively. There no evidence direct cascade overlap this study. Cascade effects are estimated become for fluences 10 22 n m 2 . found vary N ~√φt short transition period all four metals. Re-examination published data indicates that relationship may be broadly applicable over temperature range 80 400 K. Logarithmic plots versus showed anomalous curvature due nonlinear survival rate. should used exclusively determine dependence radiation damage processes.