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Study of Interaction of Short Fatigue Cracks in 2024T351 Aluminium Alloy
H. Proudhon, J-Y. Buffière

Last modified: 2013-12-02

Abstract


In the present paper, the growth of short fatigue cracks in center holesamples of a 2024T351 Aluminium alloy used in aerospace applications. Constantstress amplitude fatigue tests were carried out and the crack growth has been monitoredby optical microscopy. were done. It is shown that three different type of cracks can bedistinguished, according to their propagation behaviour. Those different behaviourshave been studied with the EBSD (Electron Back Scatter Diffraction) technique. Firstresults obtained show that crack growth is strongly influenced by the localcrystallographic orientation even within the plastic zone arond the hole. Crack pathprediction is succesfully implemented but the model still limits the predictions .

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