Modeling of creep behavior in AlSiCuNiMg alloy at different temperatures and stress levels

Authors

1 Semnan University

2 Irankhodro Powertrain Company

Abstract

In this article, the creep behavior of the AlSiCuNiMg alloy, which has been widely utilized in the piston component of the vehicle engine, has been modelled at different temperatures and various stresse levels. For this objective, the creep test was done on casted standard specimens, under a constant temperature and a constant tensile loading condition. Temperatures in creep testing were considered as 250, 275 and 300°C and stress levels were 75, 100 and 125 MPa. Experimental data showed that at a constant stress level, by increasing the temperature, the minimum true strain rate increased and the final true strain decreased; however, at a constant temperature, by increasing the stress level, both mentioned values increased. Based on modeling results, the temperature-dependent power law was the superior strain rate-based model, with the lowest value for the relative error and the scatter-band. In addition, the Bailey-Norton model had better modeling results between strain-based models.

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Main Subjects

References

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Journal of Solid and Fluid Mechanics
Volume 9, Issue 2
June 2019
Pages 61-76

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