Metallic hollow spheres foam: Structure and mechanics

A. Fallet, L. Salvo, Y. Brechet

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Metallic hollow spheres foams are made of packing of thin spherical metallic shells connected by a solid neck. The process of manufacturing allows to get a controlled distribution of cell sizes, and the structural parameters to characterize the microstructure are relatively simple. Structural characterization of hollow spheres foams of nickel (manufactured by electrochemistry and brazing) and 316L stainless steel (manufactured by powder metallurgy) has been carried out by X-ray tomography. This technique allows to determine the three-dimensional microstructure of the foam and thus to quantify the microstructure parameters and their dispersions. In-situ X-ray tomography compression tests have been carried out. These tests enable to study the main deformation mechanisms that govern the plasticity of the foam. FEM calculations of the compression of a pair of connected spheres have been performed in order to identify the conditions under which either mechanism is operative. Finally maps showing the dominant mechanisms according to the geometry of the cells have been drawn.

Original languageEnglish
Title of host publicationMetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams
Pages343-346
Number of pages4
Publication statusPublished - 2008
Externally publishedYes
EventInternational Conference on Porous Metals and Metallic Foams 2007 - Montreal, Canada
Duration: 5 Sep 20087 Sep 2008
Conference number: 5th

Publication series

NameMetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams

Conference

ConferenceInternational Conference on Porous Metals and Metallic Foams 2007
Abbreviated titleMetFoam 2007
CountryCanada
CityMontreal
Period5/09/087/09/08

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