Properties of newly developed Co-based brazing fillers

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• 作者：T . Uhlig ; S. Weis ; B. Wielage ; G. Wagner ; S. Schuberth
• 关键词：(IIW Thesaurus)Brazing fillers ; Brazed joints ; High temperature brazing ; Tensile tests
• 刊名：Welding in the World
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：61
• 期：1
• 页码：171-180
• 全文大小：
• 刊物主题：Metallic Materials; Continuum Mechanics and Mechanics of Materials; Theoretical and Applied Mechanics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1878-6669
• 卷排序：61

文摘

Co-based materials are widely used in high temperature applications like aircraft industry, industrial furnaces, or gas turbine manufacturing. The main requirements on the Co superalloys are high temperature and corrosion resistance. To produce complex structures, it is necessary to join these alloys. In this work, Co-based brazing fillers for high temperature service conditions are developed. The influence of different alloying elements on the melting behavior as well as on the microstructure is investigated. A melting temperature below 1200 °C is achieved via addition of Ti to the near eutectic alloy CoZrTaC9, developed in previous studies. Brazing tests are carried out on the Co-based superalloy Mar M 509 using induction heating. The mechanical properties are determined by tensile tests at room temperature and at an elevated temperature of 850 °C. The fracture morphology of the tensile samples is investigated by light microscopy as well as SEM.