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Viewing the Early Stage of Metal Foam Formation by Computed Tomography using Synchrotron Radiation
Author(s) -
Helfen L.,
Baumbach T.,
Stanzick H.,
Banhart J.,
Elmoutaouakkil A.,
Cloetens P.
Publication year - 2002
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/1527-2648(20021014)4:10<808::aid-adem808>3.0.co;2-u
Subject(s) - materials science , synchrotron radiation , stage (stratigraphy) , computed tomography , metal foam , synchrotron , tomography , radiation , composite material , optics , metal , metallurgy , radiology , medicine , physics , paleontology , biology
Foamed aluminium alloy containing 7 wt.‐% of Si is investigated by μm‐resolved X‐ray computed tomography (CT) using synchrotron radiation. The foam is fabricated employing a powder metallurgical route. The evolution of foam microstructure is characterized by studying a series of samples representing different stages of foam expansion obtained by interrupting the foaming process for each sample at different foaming times. The computer tomographic reconstruction provides a 3D image of the pore structure as well as the spatial distribution of blowing agent particles. A statistical evaluation allows to determine the size distribution of the blowing agent and of the pores at different foaming stages.