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Materiale Plastice (Mater. Plast.), Year 2016, Volume 53, Issue 4, 708-712



Alexandru Ghiban, Brandusa Ghiban, Nicolae Serban, Tudor Viorel Tiganescu

Hot Working Behaviour of a New Dental Alloy


Abstract:
Cobalt based alloys are widely used in medicine, the system CoCrMo being used for partial removable dentures realization. The extension of the applications for these alloys is based either on alloying of the tertiary system with new elements, or to the using of the plastic forming components. Titanium, which is well-known for its biocompatibility property, was used as an alloying element for the system CoCrMo in order to increase the physical-chemical properties of these alloys. Present paper has the aim of establishing the plastic forming behavior of the new alloy from the system CoCrMoTi, with 5.5%Ti, which will be possible used in dentistry. The experiments were realized in laboratory conditions, on a free falling dawn hammer, with high of free falling about H = 0.2 m,, and the falling dawn mass about 71 kg. The determinations were made in the range of temperatures about 1100 - 1250°C, at every 50°C. Finally, the graphics of plastic forming versus temperature and mechanical working versus temperature were drawn. The final conclusion was that the optimum range of temperature for hot working of the CoCrMoTi alloy is 1150 ÷ 1250°C, in which the plastic forming resistance and specific hot working are optimum.


Keywords:
cobalt based alloys; deformability; optimum range for plastic forming; partial removable dentures

Issue: 2016 Volume 53, Issue 4
Pages: 708-712
Publication date: 2016/12/30
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