Strain-controlled uniaxial fatigue of an AA2519 aluminium alloy sheet

Abstract

This study provides a comprehensive investigation of the uniaxial, strain-controlled fatigue behaviour of an AA2519 aluminiumcopper alloy. The alloy was characterized in the as-fabricated state. Three orientations relative to the rolling direction were used to determine the mechanical properties. The quasi-static strength and cyclic stress-strain response of the AA2519 aluminium alloy for the examined cases were similar regardless of the rolling direction, although slight differences between them were noticeable. Similarly, the fatigue life was not strongly affected by the specimen orientation. The investigation also included fractographic analysis of the fracture surfaces, revealing differences between strain amplitude levels and specimen orientations. The experimental results obtained provide a good basis for engineering applications of the analyzed AA2519 alloy and offer a solid foundation for further research into the effect of heat treatment on the fatigue strength of the investigated alloy.