Effect of solution treatment and aging on microstructure and hardness of TC11 titanium alloy

doi:10.13251/j.issn.0254-6051.2022.12.010

Abstract

Abstract: Effects of solution temperature and solution time on microstructure and microhardness of TC11 titanium alloy bar under the same aging treatment processes were studied. The results show that when the TC11 titanium alloy is solution treated below the phase transition point, the content of equiaxed primary α phase increases with the increase of solution temperature. When the solution temperature approaches the phase transition point, the content of equiaxed primary α phase decreases rapidly. When the solution temperature is 950 ℃, with the increase of solution time, the grain boundary α phase begins to grow, and the lamellar α phase turns into the mixed microstructure of bulk α phase and equiaxed α phase. When the solution time is fixed, the hardness of the TC11 titanium alloy decreases first and then tends to be stable with the increase of solution temperature. The hardness reaches the maximum value when solution temperature is 950 ℃ and solution time is 120 min.

Key words: TC11 titanium alloy, heat treatment, solution temperature, solution time, microstructure, hardness

CLC Number:

TG166.5

Zhu Ningyuan, Chen Shihao, Liao Qiang, Chen Qiuming, Lai Wenkun, Zuo Shoubin. Effect of solution treatment and aging on microstructure and hardness of TC11 titanium alloy[J]. Heat Treatment of Metals, 2022, 47(12): 62-66.

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