Void Formation in Neutron-Irradiated Ti-Al Alloys

Abstract

Although it is generally thought that Ti1 and Ti-alloys2 are resistant to neutron-irradiation-induced void formation, this conclusion is prinicipally based on relatively low-fluence exposures (<1 X 1022 neutrons/cm2) and limited heavy-ion irradiation experiments3. As part of an investigation of the mechanisms controlling the irradiation responses of Ti and its alloys, two Ti-Al alloys, containing 3 and 6 wt.% Al, respectively, and a pure Ti control material, prepared by the same procedures used for the alloys, have been examined by TEM following neutron irradiation in the EBR-II Reactor to a fluence of 5 X 1022 Neutrons/cm2, E>0.1 MeV (∿35 displacements per atom, or dpa), at a temperature of 500°C.