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Title: Mechanical Properties and Corrosion Behavior of Thermally Treated Ti-6Al-7Nb Dental Alloy
Authors: Hulka, Iosif 
Florido Suárez, Néstor Rubén 
Mirza Rosca, Julia Claudia 
Saceleanu, Adriana
UNESCO Clasification: 330307 Tecnología de la corrosión
331209 Resistencia de materiales
331402 Prótesis
Keywords: Heat treatment
Dental alloy
Corrosion resistance
Issue Date: 2022
Project: project number CABINFR2019-07
Journal: Materials 
Abstract: Ti and its alloys have the most satisfactory properties for biomedical applications due to their specific strength, high corrosion resistance, and high biocompatibility. Ti-6Al-7Nb has been approved for clinical use, proving to be a viable replacement for the Ti-6Al-4V alloy that has been used for many decades in medical applications. In our study, the Ti-6Al-7Nb alloy underwent heat treatment, was cooled in various cooling media such as mineral oil and water, and was then quenched in the oven. The microstructure was investigated, and the mechanical characterization was carried out by Vickers microhardness test. Young’s modulus measurements and tensile tests were performed in order to study the effect of cooling media on the material. To study the corrosion behavior, in vitro studies were performed on the Ti-6Al-7Nb samples in simulated body conditions by using artificial saliva. It was observed that the martensitic phase changed as a function of cooling media, and a less intensive cooling medium decreases strength properties’ indicators as well as hardness values. The results emphasize that the use of heat treatment improves the passive layer’s resistance in the presence of artificial saliva.
ISSN: 1996-1944
DOI: 10.3390/ma15113813
Source: Materials [ISSN 1996-1944], v. 15 (11), 3813, (2022)
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