SWELLING OF NEUTRON-IRRADIATED VANADIUM ALLOYS

[摘要] The swelling of unalloyed vanadium and vanadium alloys containing Cr, Ti, Si, Fe, Zr, W, Mo, and Ni additions was determined after neutron irradiation at 420 and 600-degrees-C to 17-84 dpa in the FFTF-MOTA reactor facility. The swelling of these materials was obtained from a determination of the immersion density of the unirradiated and irradiated materials. The swelling of V is substantially increased by the addition of Cr, and significantly reduced by the addition of Ti. The swelling of V-Cr-Ti alloys is strongly dependent on Ti concentration for Ti concentrations < 3%. For resistance to irradiation-induced swelling, the Ti concentration in a V-Cr-Ti alloy that is to be used as a structural material in a magnetic fusion reactor should be greater than 3%. For these ranges of Ti concentration in a V-Cr-Ti alloy, Cr concentrations of < 15% have minimal effect on the swelling of the alloy. The Vanstar-7 alloy exhibits high (7-10%) swelling on irradiation at 600-degrees-C to 77 dpa. Swelling of V-7.2Cr-14.5Ti, V-13.5Cr-5.2Ti, V-9.2Cr-4.9Ti, V-3.1Ti-(0.3-0.5)Si, and V-17.7Ti on neutron irradiation at 600-degrees-C to 87 dpa is (in % per dpa) 0.10, 0.03, 0.03, 0.01, and 0.01, respectively.

[发布日期] 1991-03-01

[效力级别]  Proceedings Paper