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The effect of oxygen, nitrogen and carbon on the microstructure and compression properties of titanium foams

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Abstract

This paper presents the effect of oxygen, nitrogen, and carbon concentration on the microstructure and properties of titanium foams produced with a powder metallurgy process. Oxygen and nitrogen reduce the ductility and increase the compression yield strength of CpTi foams. The effect of nitrogen appears to be similar to the effect of oxygen, a trend different from the ones reported in the literature for dense titanium in tension, where the effect of nitrogen is recognized to be significantly more important than the effect of oxygen. For carbon, the levels investigated were above the room temperature solubility limit of carbon in α-Ti and titanium carbides were observed in the microstructure. The volume fraction of carbides observed in the microstructure increased with carbon content. The effect of the carbides on the compression properties and ductility of the titanium foams is, however, small compared to the effect of oxygen and nitrogen.

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Acknowledgments

The authors would like to acknowledge J.P. Nadeau, S. Mercier, D. Simard and F. Perrin for their contributions in the experimental work presented in this article.

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  1. National Research Council Canada, Boucherville, Québec, J4B 6Y4, Canada

    Louis-Philippe Lefebvre, Eric Baril & Laurent de Camaret

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  1. Louis-Philippe Lefebvre
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  2. Eric Baril
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  3. Laurent de Camaret
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Correspondence to Louis-Philippe Lefebvre.

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Lefebvre, LP., Baril, E. & de Camaret, L. The effect of oxygen, nitrogen and carbon on the microstructure and compression properties of titanium foams. Journal of Materials Research 28, 2453–2460 (2013). https://doi.org/10.1557/jmr.2013.114

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  • DOI: https://doi.org/10.1557/jmr.2013.114

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