Ti-Al合金のクリープ損傷中の非線形超音波特性の変化

抄録

In recent years, the demand for higher temperature and higher efficiency in high-temperature equipment such as jet engines and gas turbines has led to the research and development of heat-resistant steels and Ni-based superalloys, which have greatly improved heat resistance. Ti-Al alloys have been attracting attention as advanced heat-resistant materials for further improvement of efficiency and weight reduction. In this study, this research aims to elucidate the creep properties of a wrought Ti-Al alloy, Ti-43Al-5V-4Nb with a triplex microstructure. Nonlinear ultrasonic properties of creep specimens of Ti-Al alloys are measured using electromagnetic ultrasonic resonance and the changes of ultrasonic properties with the progress of creep damage are investigated.