Effect of precipitates on the high temperature creep and creep rupture properties of Ti60 alloy
析出相对Ti60钛合金蠕变和持久性能的影响

The influence of Si in solution, silicide and α2 phase on the high temperature creep and creep rupture properties of Ti–60 titanium alloy was investigated. The results show that silicide precipitated between α plates increases the creep resistance at 600 oC, which becomes more pronounced when α2 phase precipitated in the matrix. However, the effect of silicide on the creep rupture property was negative when silicides exist in large size and amount. Precipitation of α2 phase was beneficial both to high temperature creep and creep rupture properties. Increase of silicide in solution by way of lowering the silicide precipitation was more beneficial to creep rupture properties with higher applied stress than to creep properties with lower applied stress. The underlying mechanism under creep test condition can be rationalized by the different deformation mechanism under different applied stress.