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Effect of pore size, morphology and orientation on the bulk stiffness of a porous Ti35Nb4Sn alloy

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journal contribution
posted on 08.05.2018 by Carmen Torres, John McLaughlin, Ross Bonallo
The metal foams of a titanium alloy were designed to study porosity as well as pore size and shape independently. These were manufactured using a powder metallurgy/space-holder technique that allowed a fine control of the pore size and morphology; and then characterized and tested against well-established models to predict a relationship between porosity, pore size and shape, and bulk stiffness. Among the typically used correlations, existing power-law models were found to be the best fit for the prediction of macropore morphology against compressive elastic moduli, outperforming other models such as exponential, polynomial or binomial. Other traditional models such as linear ones required of updated coefficients to become relevant to metal porous sintered macrostructures. The new coefficients reported in this study contribute toward a design tool that allows the tailoring of mechanical properties through porosity macrostructure. The results show that, for the same porosity range, pore shape and orientation have a significant effect on mechanical performance and that they can be predicted. Conversely, pore size has only a mild impact on bulk stiffness.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Materials Engineering and Performance

Citation

TORRES-SANCHEZ, C., MCLAUGHLIN, J. and BONALLO, R., 2018. Effect of pore size, morphology and orientation on the bulk stiffness of a porous Ti35Nb4Sn alloy. Journal of Materials Engineering and Performance, 27 (6), pp.2899–2909

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Springer (© The Authors)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

17/04/2018

Publication date

2018

Notes

This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

1059-9495

eISSN

1544-1024

Language

en

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