Abstract

GARCIA LAVARIEGA, Darío Antonio; ABUNDEZ PLIEGO, Arturo; GARCIA LOPEZ, Christian Jesús  and  MAYEN CHAIRES, Jan. Relationship between growth and temperature at the tip of the fatigue crack in AISI 1018 steel. Rev. cienc. tecnol. [online]. 2023, vol.6, n.1, e245.  Epub Aug 14, 2023. ISSN 2594-1925.  https://doi.org/10.37636/recit.v6n1e245.

In this work, a study dealing with the correlation between the fatigue crack growth behavior and the temperature evolution at the tip of the fatigue crack of the AISI 1018 steel is presented. Both the crack length and the temperature at the crack tip were experimentally obtained from a fatigue test carried out according to the ASTM E647; the temperature at the crack tip was simultaneously acquired by thermocouples and infrared thermography, while the crack length was acquired through a microscope. The experimental data were processed aimed at plotting the curves of the temperature against cycles as well as the crack length against cycles in order to be able to correlate the information and, therefore, to obtain by linear regression of the experimental data a model to correlate the temperature at the crack tip to the crack length. The results showed that, on one hand, the linear regression is in good agreement with the experimental data, and, on the other hand, the proposed model allows estimating the trend and the magnitude of the temperature when the crack grows.

Keywords : Crack growth; Temperature; Metal fatigue; Thermocouples; Thermographic camera.

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