Helium embrittlement of a lamellar titanium aluminide

Microstructural design for thermal creep and radiation damage resistance of titanium aluminide alloys for high-temperature nuclear structural applications

“…Large bubbles were observed at the interfaces inside the a 2 phase or at the a 2 /c interfaces, but no bubbles or cavities in the c phase at the irradiation temperature of 800°C and 1000°C. The size of the bubbles increased with increasing irradiation temperature [41].…”

Radiation-Induced Helium Bubbles in Metals

“…As one form of well-known radiation damage, high temperature He embrittlement in metals has attracted tremendous interests in past decades [140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163]. A very low overall helium concentration could significantly degenerate the mechanical properties of metals, leading to catastrophic fracture of nuclear reactor components [140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163]. Kramer et al [142] performed tensile tests on 304 SS after He implantation.…”