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

Published online by Cambridge University Press:  14 May 2013

Louis-Philippe Lefebvre ,
Eric Baril  and
Laurent de Camaret
Louis-Philippe Lefebvre*
Affiliation:
National Research Council Canada, Boucherville, Québec, J4B 6Y4, Canada
Eric Baril
Affiliation:
National Research Council Canada, Boucherville, Québec, J4B 6Y4, Canada
Laurent de Camaret
Affiliation:
National Research Council Canada, Boucherville, Québec, J4B 6Y4, Canada
*
a)Address all correspondence to this author. e-mail: louis-philippe.lefebvre@cnrc-nrc.gc.ca
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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.

Type
Invited Papers
Information
Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2453 - 2460
Copyright
Copyright © Crown Copyright, Published by the Materials Research Society 2013 

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References

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