Mechanical and fatigue properties of martensitic 20X13 and austenitic 12X18H10T at interaction with lead nad lead-bismuth melts

The effect of Pb and Pb-Bi melts on mechanical properties and fatigue of Fe-13Cr and Fe-18Cr-10Ni-Ti steels in temperature interval 250...750 deg C has been investigated. It was shown that metal melts lead to increasing of strength of Fe-13Cr steel on 10...20 % as compared with vacuum and this effect increases with temperature rising. Fe-13Cr steel is prone to liquid metal embrittlement in temperature interval 350...450 deg C, particularly in Pb-Bi melt. Mechanical properties of Fe-18Cr-10Ni-Ti are not affected by metal melts. Both Pb and Pb-Bi assist in reducing of fatigue life of steels and this effect is more significant in Pb-Bi