Effect of Rhenium and Niobium on Weld Metal Ductility of Molybdenum by EB Welding : Weldability of Molybdenum and Its Alloy Sheet (Report III)(Materials, Metallurgy & Weldability)

概要

論文の詳細を見る
Effect of rhenium and partly niobium on the ductility of the welds of electron-beam melted pure molybdenum and arc-melted TZM alloy by electron-beam welding have been investigated by using a 3-points simple bend test. It was made clear that only rhenium was a beneficial alloying element to improve the ductility of weld metal of pure molybdenum. Bend DBTT of the pure Mo welds decreased to 20℃ and -20℃ for 3.3% and 13.5%Re in weld metal, respectively in comparison with 60℃ of pure Mo welds. However, there was no obvious improvement of ductility of TZM welds even with much Re content of 18.5% in weld metal. Niobium showed almost no improvement of ductility of pure Mo welds in the range of 1.3% to 2.7% in weld metal.
大阪大学の論文