Gas permeability of Ti6Al4V foams prepared via gelcasting, experiments and modelling
Résumé
The use of light components possessing tailored functional properties will represent one of the main issues for the development of new products. Open cells foams, where porosity is engineered in order to grant for lightness, high geometrical surface, interconnectivity and permeability, can be shaped using various techniques and possess regular or irregular structure. In this work, Ti6Al4V foams were produced using the gelcasting route, a technique usually employed for ceramics. Numerical simulations were carried out directly on 3D images of the foam's microstructure obtained by X-ray 3D µCT in order to predict the gas permeability properties of the produced samples. The obtained results were compared to experimental measurements of gas permeability. This approach could be useful for the prediction of Newtonian fluids permeability behavior of non-periodic and complex porous structures. © 2018 Elsevier B.V.
Mots clés
Geometrical surfaces
Functional properties
X rays
Vanadium alloys
Titanium alloys
Ternary alloys
Porosity
Newtonian liquids
Morphology
Metal foams
Mechanical permeability
Computerized tomography
Computational fluid dynamics
Aluminum alloys
Interconnectivity
Irregular structures
Newtonian fluids
Permeability properties
Porous structures
X-ray computed tomography
Gas permeability
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