Evaluation of Former Soviet Union Welding Processes on Commercially Pure Titanium

摘要

The U.S. Army Research Laboratory (ARL) and the U.S. Naval Surface Warfare Center (NSWC)jointly performed a preliminary investigation of advanced titanium gas tungsten arc welding (GTAW) technologies developed in the former Soviet Union (FSU). Commercially pure titanium (CP Ti) plates were supplied to the E.O. Paton Electric Welding Institute, Kiev, Ukraine, and were welded by GTAW with flux-cored filler wire, twin-arc GTAW, and narrow gap magnetically impelled GTAW. The three CP Ti weldment specimens were then evaluated at ARL and NSWC through nondestructive inspection, chemical analysis, mechanical property determination, and metallographic examination. The objective of this study was to evaluate the quality of the welds and to assess the applicability of the FSU welding techniques to U.S. Army ground vehicle and weapon system fabrication. Information is provided about visual and radiographic features, chemical composition, tensile, ductility, and bend properties, hardness profiles, and micro-structural characteristics of the base metal and weld deposits.