Development of a physical simulation method of steel welds for fatigue crack propagation studies, on heat affected zones

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Published May 3, 2016
https://doi.org/10.19053/01211129.4628
Section: PAPERS
Issue: Vol 25 No 42 (2016)
How to Cite
Atehortua-López, D., Catacolí-Pereira, R., Aguilar-Castro, Y., Sánchez-Sthepa, H., & Sabirov, I. (2016). Development of a physical simulation method of steel welds for fatigue crack propagation studies, on heat affected zones. Revista Facultad De Ingeniería, 25(42), 33-54. https://doi.org/10.19053/01211129.4628
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Autores

Daniel Fernando Atehortua-López
Universidad del Valle (Cali – Valle del Cauca, Colombia); Universidad Carlos III (Leganés – Madrid, España)., Colombia.

Ramiro Catacolí-Pereira
Universidad del Valle (Cali – Valle del Cauca, Colombia)., Colombia.

Yesid Aguilar-Castro
Universidad del Valle (Cali – Valle del Cauca, Colombia)., Colombia.

Héctor Sánchez-Sthepa
Universidad del Valle (Cali – Valle del Cauca, Colombia)., Colombia.

Ilchat Sabirov
Instituto Madrileño de Estudios Avanzados de Materiales (Getafe – Madrid, España)., Spain.

Abstract

In order to study the fatigue crack propagation in the Highly Affected Zone (HAZ) of structural steel weld joints, test specimens of 90 mm x 49.5 mm x 7 mm in size were used to carry out the simulations, for which a special procedure was required to be developed in the Gleeble system. By doing so, the fine grain zone, the coarse grain zone and the multi-pass zone of a weld joint were successfully reproduced separately, on different samples of the corresponding base metal, produced by FCAW. The simulated zones were reproducible, homogeneous, defect-free, residual-stress-free and large enough, besides their microstructural characteristics (such as grain size and phase percentage) were very close to their real counterparts, which made it possible to study the actual effect of HAZ microstructure on the fatigue crack propagation rate in these zones for the first time. Therefore, the development enabled to significantly applications and the advantages increase, that this technique may have, while allowing to improve the understanding of fatigue behavior in steel weld joints.

Keywords:

fatigue crack propagation
HAZ microstructural variation
HAZ physical simulation
structural steel welding

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