로켓모터용 노즐재의 관대관 마찰용접과 AE평가에 관한 연구

A Study on Tube-to-Tube Similar Friction Welding of Rocket Motor Nozzle Material and its AE Evaluation

This paper presents the experimental examinations and statistical quantitative analysis of the correlation between the cumulative counts of acoustic emission(AE) during plastic deformation periods of the welding and the tensile strength and other properties of the tube-to-tube welded joints of O.D. 30mm (I.D 18mm) nozzle steel. This is a new approach which attempts finally to develop real-time quality monitoring system for friction welding. And this study results in practical possiblility of real-time quality control more than 100% joint efficiency showing good weld no micro structural defects.