Grain Growth Kinetics of TB18 Titanium Alloy

The beta grain growth behavior of a novel high strength TB18 titanium alloy was investigated through the variation of beta grain size in TB18 titanium alloy under the conditions of different temperatures and holding times. Results show that the heat treatment temperature and holding time have significant effects on the beta grain growth of TB18 titanium alloys. The beta grain size is increased with increasing the solution temperature and holding time. Besides, the coarsening temperature of TB18 alloys is 920 degrees C. The grain growth exponents and grain growth activation energy were calculated by Beck equation and Arrhenius equation, respectively. The grain growth exponent n is 0.13 similar to 0.26 for the TB18 alloys. The grain growth activation energy of the TB18 alloy is 34.27 similar to 60.58 kJ/mol.