Acoustic Emission Monitoring of Martensite Formation During Welding

本计画探讨声发射之应用 检测马氏体并最终检测裂纹的技术， 高强度钢的焊接。 该项目定量 将产生的发射信号与焊接变形相关联 过程 信号处理用于实现识别和 随后表征由马氏体产生的信号， 将它们与来自焊接的其它源的信号区分开 过程 这项研究的最终目的是检测 这将导致裂缝的形成，并将结果反馈给 重置焊接参考输入（焊接速度、电流或电压） 并允许焊接过程的实时过程控制。

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.