Effect of Temperature on Iodine-Induced Stress Corrosion Cracking of Zr-Sn-Nb Alloy

The behaviors of iodine-induced stress corrosion cracking of N 18 and N36 alloys at different temperatures have been investigated.The characterizations of the SCC fractures have been examined by SEM.The results show that,for recrystallized zirconium alloys,the critical stress intensity factor K_ISCCand stress decrease,as well as critical time shortens with test temperature increasing;for stress relieved zirconium alloys,the critical stress intensity factor K_ISCC almost keeps unchanged,but the critical stress decreases and critical time shortens when temperature changes from 300℃to 350℃.The higher temperature is,the more the corrosion product is.