Quantification and modelling of the microstructure/strength relationship by tailoring the morphological parameters of the T-1 phase in an Al-Cu-Li alloy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Acta Materialia Année : 2014

Quantification and modelling of the microstructure/strength relationship by tailoring the morphological parameters of the T-1 phase in an Al-Cu-Li alloy

Résumé

We present a systematic study of the relationship between precipitate microstructure and resulting yield strength in an Al-Cu-Li alloy. By varying the thermomechanical ageing treatments applied to the AA2198 alloy (pre-deformation, heat treatment temperature and duration), T-1 microstructural parameters (thickness, diameter and volume fraction) are varied over a wide range, and the corresponding yield strength is determined. The resulting database of microstructure strength relationships is used to establish a strengthening model based on interfacial and stacking fault strengthening. This model successfully describes the strength evolution from under-aged to over-aged conditions without the need for a transition from precipitate shearing to by-passing.

Domaines

Matériaux
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Dates et versions

hal-01121261 , version 1 (27-02-2015)

Identifiants

Citer

Dorin T., A. Deschamps, F. de Geuser, C. Sigli. Quantification and modelling of the microstructure/strength relationship by tailoring the morphological parameters of the T-1 phase in an Al-Cu-Li alloy. Acta Materialia, 2014, 75, pp.134-136. ⟨10.1016/j.actamat.2014.04.046⟩. ⟨hal-01121261⟩
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