Irradiation Effects in Ni–17Mo–7Cr Alloy Bombarded with MeV Au Ions

Irradiation effects in Ni–17Mo–7Cr alloy have been systematically investigated by using 3 Me V Au ions at different fluences ranging from 8 × 10^13cm^-2to 2.3 × 10^15cm^-2,corresponding to doses of 1–30 dpa.The results indicated that sample microstrain increased gradually from 0.14 to 0.22% as dose increased from 0 to 30 dpa.Besides,the nanohardness of Ni–17Mo–7Cr alloy increased with irradiation dose until 10 dpa,and then,softening effect became dominant while further increasing dose to 30 dpa.After being irradiated at room temperature,the swelling rate of Ni–17Mo–7Cr alloy was found to be around 0.04% per dpa.These data are helpful in estimating the irradiation resistance of this newly developed Ni–17Mo–7Cr alloy in nuclear energy systems.