Characterisation of weld heterogeneity through hardness mapping and miniature tensile testing

  • Jonas Bally (Ghent University)
  • Wim De Waele (Ghent University)
  • Patricia Verleysen (Ghent University)
  • Nenad Gubeljak (Ghent University)
  • Stijn Hertelé (Ghent University)


Welding is a widely adopted industrial process used for joining components. A fusion weld has a highly heterogeneous microstructure and characterisation of strength heterogeneity is difficult because of the potentially large variations over a limited distance. Hardness mapping and miniature tensile tests are two distinct approaches to this problem. This paper reports on the possibilities and limitations of both techniques. Hardness mapping is a well-documented procedure as opposed to miniature tensile testing, where the dimensions of the dogbone shaped specimens are smaller than what standards prescribe. A particular challenge is the measurement of strains in such small specimens. The authors have achieved this measurement by means of Digital Image Correlation (DIC). To that end, a sufficiently fine speckling method has been developed.

How to Cite:

Bally, J., De Waele, W., Verleysen, P., Gubeljak, N. & Hertelé, S., (2015) “Characterisation of weld heterogeneity through hardness mapping and miniature tensile testing”, International Journal of Sustainable Construction and Design 6(3), 8. doi:

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Published on
07 Oct 2015
Peer Reviewed