Characteristic of Ti-6Al-6Nb alloys following solution treatment with cryogenic cooling for implant applications

Abstract

Titanium alloys are widely used as implant materials, due to the mechanical properties, one of which is the low elastic modulus. The differences in the elastic modulus of Titanium alloys and Bones are wide enough, therefore it's necessary to investigate how to obtain a lower Titanium elastic modulus. In this paper used Ti-6Al-6Nb alloys as an implant material. The Ti-6Al-6Nb alloys Solution Treated at 1100°C, following cryogenic cooling with liquid Nitrogen. Before that The Ti-6Al-6Nb alloys Homogenized at 1100°C for 12 hours, then Hot rolled with preheated at 1100°C for 30 minutes. As comparison Solution Treatment also done in the ice water cooling and air cooling. The Ti-6Al-6Nb alloys characterized with a hardness test, metallographic and ultrasonic test to obtain the elastic modulus. The analysis shows that the lowest elastic modulus was 100,19 GPa and highest hardness was 52,54 HRc is in the cryogenic cooling process due to the beta phase formed.