International Journal of Fatigue 108 (2018) 35–46 Contents lists available at ScienceDirect International Journal of Fatigue journal homepage: www.elsevier.com/locate/ijfatigue Eﬀect of pre-deformation on the pre-corrosion multiaxial fatigue behaviors of 2024-T4 aluminum alloy Yajun Chen , Jian Zhou, Chenchen Liu, Fusheng Wang Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China ARTICLE I NFO ABSTRACT Keywords: Pre-damages which contain pre-deformation and pre-corrosion have inﬂuences on multiaxial fatigue properties. 2024-T4 aluminum alloy In this paper, the eﬀect of pre-tension of 1%, 2%, 3% and 4% as well as pre-torsion of 10°, 20°, 30° and 40° on Multiaxial fatigue fatigue life of 2024-T4 aluminum alloy under corrosion conditions is evaluated. Multiaxial fatigue tests are Pre-deformation performed under constant amplitude sinusoidal wave loading with tension-torsion ratio of 3 in air at room Pre-corrosion temperature. The results indicate a reduction tendency of pre-corrosion multiaxial fatigue life with the pre- Life prediction deformation level in the same pre-corrosion time. With the same pre-deformation level, the pre-corrosion multiaxial fatigue life decreases as pre-corrosion time increases. Pitting caused by corrosion is observed on the surface of specimens. The observed mechanical behavior and associated phenomena are directly linked to mi- crostructure characteristics such as
International Journal of Fatigue – Elsevier
Published: Mar 1, 2018
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