ABSTRACT In the present study, creep tests of a TiAl alloy were conducted using miniature specimens ( d = 2 mm) under various conditions to investigate their creep properties at 760°C. The test results indicate that creep rupture time obtained using miniature specimens at identical applied stress levels increase with the order of test condition Ar gas 150 mL/min > Ar gas 75 mL/min > air. However, all test results were shorter than those obtained using a bulk specimen ( d = 6 mm). Furthermore, the effect of oxidation on creep rupture time was examined. It was observed that even in the Ar gas 150 mL/min test condition, an oxidation layer still formed after a long‐term creep test. Finally, creep rupture time prediction was performed using four proposed approaches considering the thickness of the oxidation layer. Among them, the stress‐correction–based approach had the highest prediction performance.
He et al. (Fri,) studied this question.