Experimental evaluation of aluminothermic welds

0576186 - ÚTAM 2024 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Zeman, L. - Valach, J. - Zlámal, P. - Krčmářová, N. - Koudelková, Veronika - Zeman, J.
Experimental evaluation of aluminothermic welds.
Acta Polytechnica CTU Proceedings. Vol. 41. Prague: Czech Technical University in Prague, 2023 - (Nouzovský, L.; Drábek, M.; Richter, P.; Růžička, J.), s. 89-97. ISBN 978-80-01-07224-0. E-ISSN 2336-5382.
[Young Transportation Engineers Conference. Prague (CZ), 24.11.2022-24.11.2022]
Institucionální podpora: RVO:68378297
Klíčová slova: aluminothermic reaction * train gauges * hardness * profilometry * scanning electron microscope
Obor OECD: Materials engineering
https://doi.org/10.14311/APP.2023.41.0089

The article presents a study of the mechanical processes occurring during the aluminother-mic reaction using experimental methods (strain gauges, digital image correlation, thermography,scanning electron microscopy, profilometry). The aluminothermic reaction is a highly efficient weldingmethod due to its exothermic behaviour, however, it places considerable demands not only on thewelding technique, but also on the capabilities of the experimental methods used - these limitationsare also discussed in the article. The aluminothermic reaction is associated with the formation of alocalised heat source with a time evolution dictated by the technological procedure, which manifestsitself in heat propagation to the surrounding weld material. The unequal evolution of the temperaturefield is the fundamental cause of the appearance of the heat affected zone or local deformations orsurface curvature, which was the focus of the experimental methods deployed above and the results ofwhich are shown in the article.
Trvalý link: https://hdl.handle.net/11104/0345780