Prediction of volume fraction of primary a phase in dual-phase titanium alloy based on laser ultrasonic

The volume fraction of the primary a phase affects the mechanical and processing properties of the dual-phase titanium alloy, its online detection is necessary and important for product quality control. In this study, samples with different microstructural characteristics were obtained by solution treated from 920 degrees C to 1000 degrees C, and the volume fraction of the primary a phase was counted by Image-Pro Plus software. Then, calculate the velocity of ultrasonic longitudinal waves in different samples and time-frequency analysis according to the signals obtained from the laser ultrasonic experiment. Finally, a prediction model of the volume fraction of the primary a phase linearly related to the ultrasonic longitudinal wave velocity was established, and the linear fit has a higher R-2 than 0.96. This study can provide a reference for the online detection of phase volume fraction.

Automated summary

In this study, samples with different microstructural characteristics were obtained and the volume fraction was calculated using image processing software. The signals from laser ultrasonic experiment were analyzed to establish a prediction model for phase volume fraction.