Impacts of trace carbon on the microstructure of as-sintered biomedical Ti-15Mo alloy and reassessment of the maximum carbon limit. Yan, M., Qian, M., Kong, C., & Dargusch, M. S. Acta Biomaterialia, 10(2):1014–1023, February, 2014. WOS:000330921700047
doi  abstract   bibtex   
The formation of grain boundary (GB) brittle carbides with a complex three-dimensional (3-D) morphology can be detrimental to both the fatigue properties and corrosion resistance of a biomedical titanium alloy. A detailed microscopic study has been performed on an as-sintered biomedical Ti-15Mo (in wt.%) alloy containing 0.032 wt.% C. A noticeable presence of a carbon-enriched phase has been observed along the GB, although the carbon content is well below the maximum carbon limit of 0.1 wt.% specified by ASTM Standard F2066. Transmission electron microscopy (TEM) identified that the carbon-enriched phase is face-centred cubic Ti2C. 3-D tomography reconstruction revealed that the Ti2C structure has morphology similar to primary alpha-Ti. Nanoindentation confirmed the high hardness and high Young's modulus of the GB Ti2C phase. To avoid GB carbide formation in Ti-15Mo, the carbon content should be limited to 0.006 wt.% by Thermo-Calc predictions. Similar analyses and characterization of the carbide formation in biomedical unalloyed Ti, Ti-6Al-4V and Ti-16Nb have also been performed. (C) 2013 Acts Materialia Inc. Published by Elsevier Ltd. All rights reserved.
@article{yan_impacts_2014,
	title = {Impacts of trace carbon on the microstructure of as-sintered biomedical {Ti}-{15Mo} alloy and reassessment of the maximum carbon limit},
	volume = {10},
	issn = {1742-7061},
	doi = {10.1016/j.actbio.2013.10.034},
	abstract = {The formation of grain boundary (GB) brittle carbides with a complex three-dimensional (3-D) morphology can be detrimental to both the fatigue properties and corrosion resistance of a biomedical titanium alloy. A detailed microscopic study has been performed on an as-sintered biomedical Ti-15Mo (in wt.\%) alloy containing 0.032 wt.\% C. A noticeable presence of a carbon-enriched phase has been observed along the GB, although the carbon content is well below the maximum carbon limit of 0.1 wt.\% specified by ASTM Standard F2066. Transmission electron microscopy (TEM) identified that the carbon-enriched phase is face-centred cubic Ti2C. 3-D tomography reconstruction revealed that the Ti2C structure has morphology similar to primary alpha-Ti. Nanoindentation confirmed the high hardness and high Young's modulus of the GB Ti2C phase. To avoid GB carbide formation in Ti-15Mo, the carbon content should be limited to 0.006 wt.\% by Thermo-Calc predictions. Similar analyses and characterization of the carbide formation in biomedical unalloyed Ti, Ti-6Al-4V and Ti-16Nb have also been performed. (C) 2013 Acts Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
	language = {English},
	number = {2},
	journal = {Acta Biomaterialia},
	author = {Yan, M. and Qian, M. and Kong, C. and Dargusch, M. S.},
	month = feb,
	year = {2014},
	note = {WOS:000330921700047},
	keywords = {3-D   tomography, Biomedical titanium alloys, Carbon limit, FABRICATION, Titanium carbides, behavior, corrosion-resistance, mechanical-properties, microwave-radiation, neutron-diffraction, porous ti-10mo alloy, powder-metallurgy, ti-mo alloys, titanium-alloys},
	pages = {1014--1023},
}

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