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Título

Influence of the thermomechanical processing on the fracture mechanisms of high strength aluminium/pure aluminium multilayer laminate materials

AutorCepeda-Jiménez, C.M.; Pozuelo, M.; Ruano, Oscar Antonio; Carreño, Fernando
Palabras claveMultilayer aluminium structures
Interfacial strength
Fracture behaviour
Delamination
Hot roll-bonding
Fecha de publicaciónago-2008
EditorElsevier
CitaciónMaterials Science and Engineering: A 490 (1-2) 319-327 (2008)
ResumenThe microstructure and mechanical properties, with emphasis in the impact fracture toughness behaviour, of two multilayer laminate materials have been investigated. The multilayer materials are constituted by alternated sheets of pure aluminium (Al 1200 or Al 1050) and high strength Al 7075 alloy. Stacked layers of these alloys have been successfully joined using two processing routes with different total hot rolling strains. Both laminates have been tested at room temperature under impact Charpy tests, 3-point bend tests and shear tests on the interfaces. Both laminates exhibited more than eight times improvement in impact fracture toughness over the monolithic Al 7075-T6. The toughness increase in the higher rolling strained laminate is almost entirely due to crack blunting mechanism, while in the lower strained laminate, crack deflection by delamination and crack renucleation processes were active.
Versión del editorhttp://dx.doi.org/10.1016/j.msea.2008.01.034
URIhttp://hdl.handle.net/10261/43760
DOI10.1016/j.msea.2008.01.034
ISSN0921-5093
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