Magnetic transition temperatures of some model alloys for simulating radiation induced segregation in austenitic stainless steel

Abstract The present work investigated the magnetic transition temperatures of four model alloys for simulating radiation induced segregation in austenitic stainless steels SUS 304. SQUID magnetometer was used to measure magnetization curves at temperature from 400 to 5 K. The results show that for model alloys with lower Ni content (8 and 10 wt%), there occurred spontaneous martensitic transformation and produced a ferromagnetic phase during the cooling process in SQUID magnetometer. For the model alloys with higher Ni concentration (20 and 30 wt%), no martensitic transformation was observed. Martensitic transformation starting temperature, Curie temperature and Neel temperature have been calculated for these alloys. It reveals that magnetic parameters are very sensitive to the change of chemical composition and microstructure.