Effect of temperature on the mode I and mixed mode I/III fracture toughness of SA333 steel

► SA333 is a low carbon ferritic steel which finds applications in nuclear reactors. ► This steel often experience temperatures up to 300 °C during service. ► This steel exhibits dynamic strain aging (DSA) in the temperature range 175-300 °C. Mode I and mixed mode fracture toughness decrease in the temp. range 175-300 °C. ► Mixed mode fracture toughness is always lower than mode I fracture toughness.