Method for judging hydrogen damage state of material based on ultrasonic online monitoring

• Main Authors: YAN GUANGLONG, LI HUIMIN, JIN JUNJUN, LIU XUAN, SUN WAN, CHEN BING, GOU GUOQING, QIU FEIFEI, QIN SHUZHI
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a material hydrogen damage state judgment method based on ultrasonic online monitoring. The method comprises the steps of establishing a hydrogen damage state prediction model and monitoring the hydrogen damage state of a to-be-tested sample in real time based on the prediction model. The step of establishing the hydrogen damage state prediction model comprises the following steps: firstly, through a hydrogen filling test of a calibration sample, drawing a calibration curve of a relative nonlinear optimal estimation coefficient and hydrogen filling time of the calibration sample and an n-order derivative reference curve of the calibration curve, and then determining the relationship between the hydrogen filling time and the hydrogen damage state, and establishing a hydrogen damage state prediction model based on relative nonlinear optimal estimation coefficient change. The step of monitoring the hydrogen damage state of the to-be-tested sample in real time comprises the substeps of col