Morphology of damage cavities in aluminium alloys
Source abstract
Abstract
We explore the morphology of damage cavities in two aluminum alloys submitted to mode I fracture, either in pure tension or in fatigue. Damage cavities linked to the main crack are shown to be self-affine with a roughness exponent 0.8, widely observed on the fracture surfaces of various materials. Independent cavities are anisotropic, revealing both the 0.8 exponent and an exponent 0.5 observed on some fracture surfaces at smaller length scales. These results suggest a scenario of crack propagation which explicitly takes into account the growth of independent cavities and their subsequent coalescence.
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Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Non-Destructive Testing Techniques · Metal Forming Simulation Techniques
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