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Effects of service environment and pre-deformation on the fatigue behaviour of 2524 aluminium alloy
The effects of service environment and pre-deformation on the fatigue behaviour of 2524 alloy were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and fatigue tests. The results indicate that the fatigue crack-growth rate (FCGR) of the alloy in an aqueous environment increases with temperature ranging from 0 to 90 °C. At the same stress intensity factor range (ΔK), the FCGR of the alloy in an argon environment is the smallest, followed by that in air, and a 3.5% NaCl fog environment, while that in an exfoliation corrosion (EXCO) solution is the largest. A pre-deformation of 2% can significantly enhance the fatigue crack propagation resistance of this alloy in argon, air, and 3.5% NaCl fog environments, while 5% pre-deformation weakens the fatigue crack propagation resistance of the alloy accordingly. The pre-deformation effect on the FCGR of alloy in the EXCO solution environment is limited.
Effects of service environment and pre-deformation on the fatigue behaviour of 2524 aluminium alloy
The effects of service environment and pre-deformation on the fatigue behaviour of 2524 alloy were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and fatigue tests. The results indicate that the fatigue crack-growth rate (FCGR) of the alloy in an aqueous environment increases with temperature ranging from 0 to 90 °C. At the same stress intensity factor range (ΔK), the FCGR of the alloy in an argon environment is the smallest, followed by that in air, and a 3.5% NaCl fog environment, while that in an exfoliation corrosion (EXCO) solution is the largest. A pre-deformation of 2% can significantly enhance the fatigue crack propagation resistance of this alloy in argon, air, and 3.5% NaCl fog environments, while 5% pre-deformation weakens the fatigue crack propagation resistance of the alloy accordingly. The pre-deformation effect on the FCGR of alloy in the EXCO solution environment is limited.
Effects of service environment and pre-deformation on the fatigue behaviour of 2524 aluminium alloy
Archiv.Civ.Mech.Eng
Chen, Y. Q. (Autor:in) / Zhang, H. (Autor:in) / Pan, S. P. (Autor:in) / Song, Y. F. (Autor:in) / Liu, X. (Autor:in) / Liu, W. H. (Autor:in)
18.12.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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