Effect of grain boundary structure on the intercrystalline damaging of austenic steel during brazing

Authors

  • Kornél Májlinger
  • Péter János Szabó
https://doi.org/10.3311/pp.me.2011-2.08

Abstract

During brazing of austenitic stainless steel with copper based brazing material a common failure occurs, namely that the brazing material solutes along grain boundaries, which looks like cracks. This unfortunate effect occurred when AISI 304 and 310 steels are brazing. To avoid this unwanted effect - since the cracks propagate mainly on high angle grain boundaries - our goal was to enhance the number of special coincident site lattice type grain boundaries with thermomechanical treatment. Experiments were performed for 1, 48 and 72 hour heat treatments on materials cold rolled at different levels. After the thermomechanical treatment significant decrease in the crack size was found in depth and width, respectively.

Keywords:

austenitic steel, copper brazing, intercrystalline cracking, electron backscatter diffraction

How to Cite

Májlinger, K., János Szabó, P. “Effect of grain boundary structure on the intercrystalline damaging of austenic steel during brazing”, Periodica Polytechnica Mechanical Engineering, 55(2), pp. 105–109, 2011. https://doi.org/10.3311/pp.me.2011-2.08

Issue

Section

Articles