Effect of Microstructure on Fatigue Life and Fracture Morphology in an Aluminum Alloy
The effect of grain refinement on the fatigue life of 7075Al alloy was evaluated using a subsize fatigue specimen. High-cycle fatigue of fine-grained 7075Al showed substantial improvement over the parent 7075-T6 material. This improvement in fatigue life is ascribed to retardation of crack propagation caused by grain boundaries acting as barriers and a crack closure effect due to crack deflection.
P. S. De et al., "Effect of Microstructure on Fatigue Life and Fracture Morphology in an Aluminum Alloy," Scripta Materialia, Elsevier, Apr 2009.
The definitive version is available at http://dx.doi.org/10.1016/j.scriptamat.2008.11.032
Materials Science and Engineering
United States. Air Force. Office of Scientific Research
Keywords and Phrases
7075-T6; High-Cycle Fatigue; Microstructure; Small Crack Propagation; Subsize Fatigue Sample
Article - Conference proceedings
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