Intercrystalline cracking of austenitic steel during brazing

Kornél Májlinger, Péter János Szabó

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

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 look like cracks. This unfortunate effect occurred when AISI 304 steel is brazed. 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 at different level of cold rolled materials. After the thermomechanical treatment significant decrease in the crack size was found in depth and width, respectively. The grain boundaries were investigated on electro polished samples in an electron microscope with electron backscattered diffraction technique. The brazing was made with Boehler SG-CuSi3 brazing material.

Original languageEnglish
Title of host publicationMaterials Science, Testing and Informatics VI
Pages442-447
Number of pages6
DOIs
Publication statusPublished - Jan 1 2013
Event8th Hungarian Conference on Materials Science - Balatonkenese, Hungary
Duration: Oct 9 2011Oct 11 2011

Publication series

NameMaterials Science Forum
Volume729
ISSN (Print)0255-5476

Other

Other8th Hungarian Conference on Materials Science
CountryHungary
CityBalatonkenese
Period10/9/1110/11/11

Keywords

  • Austenitic steel
  • Coincidence-site lattice
  • Copper brazing
  • Electron backscatter diffraction
  • Intercrystalline cracking
  • Special grain boundaries

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Májlinger, K., & Szabó, P. J. (2013). Intercrystalline cracking of austenitic steel during brazing. In Materials Science, Testing and Informatics VI (pp. 442-447). (Materials Science Forum; Vol. 729). https://doi.org/10.4028/www.scientific.net/MSF.729.442