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September 1, 1987Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties

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

Y. Bréchet F. Louchet Ch. Marchionni J.-L. Verger-Gaugry

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Abstract

The fatigue microstructure of an Al-2.5 wt%Li alloy with small δ' 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 lithium-depleted 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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Bréchet et al. (1987) studied this question.

synapsesocial.com/papers/6aa2580d24af3055112066a7 https://doi.org/10.1080/01418618708214391

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