Laser Assisted Brazing of Ceramic and Titanium Alloy Using Cu-Ag Filler Material

Abstract:

The joining of ceramic to structural alloys has received much attention in recent years because of its potentially attractive properties. In the present investigation alumina which is a ceramic has been brazed with titanium alloy (Ti6Al4V) using KM72(Ag/Cu) filler material.The study has been carried out using CO₂ laser gas in argon inert atmosphere. Uniformity of the brazed joints has been observed in scanning electron micrographs. The elements and phases present at the joint interface have been characterized by EDX and XRD spectra analysis. As per the experimental observation, the phases present in the Ti6Al4V/KM72/alumina joint are Cu₃TiO₄, Cu₃Ti₂,CuO, Ti₂Cu, CuTi, and Cu₄Ti₃. The effect of brazing process parameters on the shear strength of the brazed joint has been studied and maximum shear strength observed at brazing power of 330 watts and speed 300 mm/min is 4±0.5MPa. Micro-hardness values of the brazed interface indicate that the interface is softer than the substrate.

• Periodical: Applied Mechanics and Materials (Volumes 766-767)
• Pages: 751-756
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.766-767.751
• Online since: June 2015
• Authors: H.S. Mohan*, T.P. Bharathesh, K.V. Sreenivas Rao, Ravikumar Beeranur
• Keywords: Alumina, Filler Material, Laser Brazing, Titanium

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