Effects of different wire chemical compositions on the mechanical and microstructural characteristics of copper brazing joints


MATERIALS TESTING, vol.58, no.9, pp.748-752, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 9
  • Publication Date: 2016
  • Doi Number: 10.3139/120.110922
  • Title of Journal : MATERIALS TESTING
  • Page Numbers: pp.748-752


In this study, commercially pure (99.5 wt.-%) copper alloy plates were brazed using an oxy-gas flame with four different brazing alloys in butt and lap joints, and the brazing capability, the microstructural and mechanical property changes were examined. The experimental results showed that L-CuZn39Sn brazing wire used in the butt joining caused porosity and an adverse effect on the microstructural and mechanical properties. However, in lap joining, it was observed that the mechanical properties of this material show identical characteristics compared to other brazing wires. In lap joining conducted using the L-CuNi10Zn42 alloyed brazing wires, a very good grain structure originated by diffusion was observed.