Tribology Properties of Titanium Alloy (Ti-6Al-4V) at Various Temperature on α/β Solution Treatment and Aging Condition

Abstract

Titanium Ti-6Al-4V has outstanding mechanical and chemical properties including high strength ratio, light weight, high melting point, and good corrosion resistance. However, this titanium alloy also has disadvantages, namely low hardness, high coefficient of friction, and poor wear resistance. One way to improve the properties of material is by heat treatment. Titanium Ti-6Al-4 V in this study was heat-treated at a temperature of 900 °C for 1 h and the aging process was carried out with temperature variations of 550, 650 and 750 °C each time temperature was 8 h. The tests carried out in this study included tests of wear resistance, surface roughness and microstructure of titanium Ti-6Al-4V. The analysis revealed that the test results for the wear resistance test using the ogoshi method have decreased to 8.5628 × 10–5 mm3/kg m, while for the surface roughness test there has been a significant increase of 0.15 m, and for microstructure analysis, the results showed that the grain size changed smaller as the aging temperature increased.