The Effect of Aging Treatment on Mechanical Properties And Microstructures of Ti-12Cr In Ortodontic Applications

Abstract

Many adults experience tooth loss due to accidents and lack of care. This causes various problems, one of which is a problem in chewing food. One solution that can be used is the use of dental implants. Dental implants that are currently made of titanium Ti-6Al-4V at a very expensive price. One of the newest types of titanium alloy material that can be used with relatively cheap prices is Ti-12Cr. As a new material, the effect of heat treatment processes on mechanical properties has not been investigated in more detail. So that research is needed on the effect of heat treatment with the aging treatment process on the mechanical properties and microstructure of the Ti-12Cr material as a substitute for cheaper titanium implants. In this research, a solution treatment (ST) heat treatment was carried out at 885oC and an aging treatment (AT) at 540°C. Aging treatment is carried out with variations in holding time of 30 ks and 60 ks. Then the microstructure inspection and mechanical properties testing are carried out through hardness and tensile tests. With the aging treatment of the microstructure of the material, Ti-12Cr experienced grain refinement and the hardness obtained was higher than that of Ti-6Al-4V. The hardness values of Ti-12Cr ST, Ti-12Cr AT 30 ks, Ti-12Cr AT 60 ks and Ti-6Al-4V are 457 VHN, 605 VHN, 772 VHN, and 349 VHN. However, the tensile strength of Ti-12Cr is lower than the tensile strength value of Ti-6Al-4V.