Home > Research > Publications & Outputs > Effect of solidification rate on pore connectiv...

Electronic data

  • LAZARO_manuscriptfigures

    Rights statement: This is the author’s version of a work that was accepted for publication in Materials Science and Engineering: A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering: A, 672, 2017 DOI: 10.1016/j.msea.2016.07.015

    Accepted author manuscript, 952 KB, PDF document

    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

Links

Text available via DOI:

View graph of relations

Effect of solidification rate on pore connectivity of aluminium foams and its consequences on mechanical properties

Research output: Contribution to journalJournal articlepeer-review

Published
Close
<mark>Journal publication date</mark>30/08/2016
<mark>Journal</mark>Materials Science and Engineering: A
Volume672
Number of pages11
Pages (from-to)236-246
Publication StatusPublished
Early online date6/07/16
<mark>Original language</mark>English

Abstract

This study evaluates the influence of solidification rate on the generation and control of pore connectivity of closed-cell aluminium foams. Additionally, it gives the experimental support to evaluate and model the effect of this pore connectivity on the mechanical properties. A collection of AlSi10 foams produced via powder metallurgy route, with porosities between 0.65 and 0.85, were examined. During production, applied heating conditions were the same in all cases but the cooling conditions were varied in order to promote different solidification rates in a wide range (from -1 to -15 K/s). Structural characterisation was performed by gas pycnometry and X- ray microtomography while the mechanical properties were evaluated by microhardness measurements and uniaxial compression tests. Results showed a clear reduction of pore connectivity when increasing the solidification rate. The consequence is a prominent improvement of the foam strength over the one expected from just the matrix refinement. Further analysis on this relationship between the pore connectivity and the mechanical properties, has allowed to propose a correction to the theoretical model for collapse strength in closed cell foams to consider such contribution and predict more accurate results.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Materials Science and Engineering: A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering: A, 672, 2017 DOI: 10.1016/j.msea.2016.07.015