Experimental (TEM and STEM) investigation and theoretical approach to the fatigue-induced dissolution of delta'-precipitates in a 2.5 wt % Al-Li alloy - Science et Ingénierie des Matériaux et Procédés Accéder directement au contenu
Article Dans Une Revue Philosophical Magazine a Année : 1987

Experimental (TEM and STEM) investigation and theoretical approach to the fatigue-induced dissolution of delta'-precipitates in a 2.5 wt % Al-Li alloy

Résumé

The fatigue microstructure of an Al-2.5 wt %Li alloy with small precipitates has been investigated both by TEM and STEM (nanodiffraction and electron energy loss spectroscopy). Specific features of strain localization have been evidenced which are made of lithiumdepleted precipitate-free bands. A model is proposed to explain the redissolution of δ precipitates inside the bands, based on an increase of their free energy due to shear-induced antiphase boundaries.
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hal-03134559 , version 1 (11-02-2021)

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Yves Brechet, François Louchet, C. Marchionni, J.-L. Verger-Gaugry. Experimental (TEM and STEM) investigation and theoretical approach to the fatigue-induced dissolution of delta'-precipitates in a 2.5 wt % Al-Li alloy. Philosophical Magazine a, 1987, 56 (3), pp.353-366. ⟨10.1080/01418618708214391⟩. ⟨hal-03134559⟩
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