Acoustic Emission Monitoring of Martensite Formation During Welding

本项目研究了声发射技术在高强度钢焊接中马氏体和裂纹检测中的应用。本项目定量地将产生的发射信号与焊接变形过程联系起来。信号处理用于对马氏体产生的信号进行识别和后续表征，并将其与焊接过程中其他来源的信号区分开来。该研究的最终目标是检测可能导致裂纹形成的条件，并将结果反馈给重置焊接参考输入（焊接速度、电流或电压），并允许对焊接过程进行实时过程控制。

This project investigates the application of acoustic emission techniques to the detection of martensite and ultimately of cracks in the welding of high strength steels. This project quantitatively relates the emission signals generated to the weld transformation process. Signal processing is used to enable identification and subsequent characterization of signals generated by martensite and to differentiate them from signals from other sources of the welding process. The ultimate goal of the research is to detect conditions that would lead to crack formation and to feed the results back to reset the welding reference inputs (welding speed, current, or voltage) and permit real-time process control of the welding process.