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Título

Influence of interfacial defects on the impact toughness of solid state diffusion bonded Ti-6Al-4V alloy based multilayer composites

Autor Cepeda-Jiménez, C.M.; Carreño, Fernando; Ruano, Oscar Antonio; Sarkeeva, A.A.; Kruglov, A.A.; Lutfullin, R.Ya.
Palabras clave Ti-6Al-4V alloy
Multilayer materials
Diffusion bonding
Delamination
Delamination
Interfacial toughness
Damage tolerance
Fecha de publicación 15-feb-2013
EditorElsevier
Citación Materials Science and Engineering A 563: 28-35 (2013)
ResumenMicrostructure and mechanical properties, with emphasis in impact toughness behaviour, of two multilayer composites have been investigated. The multilayer materials are constituted by thirteen layers of high strength Ti–6 Al–4 V alloy. Stacked layers have been successfully joined by diffusion bonding considering two processing temperatures, 750 and 900 °C. The proportion of α/β phase in the microstructure during diffusion bonding process determines the presence of pores at the interface, and therefore the mechanical properties of the composite material. Higher bcc β phase proportion during diffusion bonding process at the highest temperature of 900 °C leads to high bonding degree, without noticeable toughness increase of the multilayer composite. In contrast, higher proportion of harder hcp α phase at 750 °C makes difficult the healing of interfacial pores, decreasing interfacial toughness and leading to a toughness value of the multilayer composite seven times higher than the reported value for the as-received Ti–6 Al–4 V alloy.
Versión del editorhttp://dx.doi.org/10.1016/j.msea.2012.11.052
URI http://hdl.handle.net/10261/110045
DOI10.1016/j.msea.2012.11.052
ISSN0921-5093
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