Influence of deformation prior to ageing on fatigue behavior of extruded AA6082-T6 profiles

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Wang, Xintong and Ma, Jun and Welo, Torgeir (2022) Influence of deformation prior to ageing on fatigue behavior of extruded AA6082-T6 profiles. International Journal of Fatigue, 162. 106990. ISSN 0142-1123 (https://doi.org/10.1016/j.ijfatigue.2022.106990)

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Abstract

This paper investigates the effect of plastic deformation before artificial ageing on fatigue behavior of extruded AA6082-T6 profiles. As-received, T4-temper materials are pre-deformed at different strains and followed by artificial ageing to T6-temper, simulating industrial manufacturing route of aluminum components. Load controlled, high-cycle fatigue tests are conducted for deformed, aged specimens to explore their fatigue behavior. An 18–23% increase in fatigue life is achieved by pre-straining of 5–15% in T4-temper, as compared to that without pre-straining. Furthermore, the designed manufacturing route provides a transient cyclic softening stage for AA6082 samples. The pre-strained material provides a larger cycle softening during fatigue.

ORCID iDs

Wang, Xintong ORCID logoORCID: https://orcid.org/0000-0001-6865-0411, Ma, Jun and Welo, Torgeir;
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