高度稳定化β型Ti40阻燃钛合金的动态再结晶行为

Dynamic Recrystallization Behavior of Highly Stabilized β Ti40 Titanium Alloy

采用热压缩试验方法,对高度稳定化的β型Ti40阻燃钛合金的动态再结晶行为进行了研究。结果表明,Ti40合金的动态再结晶形核机制为亚晶形核、晶界弓出形核和位错塞积形核等多种机制;Ti40合金高温塑性变形后,空冷及850℃退火的再结晶晶粒呈现混晶现象;1000℃退火,再结晶晶粒充分长大,是完全再结晶的结构特征。

Dynamic recrystallization behavior of Ti40 burn-resistant alloy, a highly stabilized β titanium alloy, was researched by hot compression test. The results indicate that the nucleation mechanism of dynamic recrystalization of Ti40 alloy includes subgrain nucleation, initial grain boundary bulging nucleation and dislocation pile-up nucleation. After high temperature plastic deformation, air-cooling and annealing at 850℃, the recrystallization grains of the alloy present mixed grain structure. Recrystallization grains grow sufficiently after the alloy is annealed at 1000℃, which is whole recrystallization structure.