Abstract
The creep of PT-3V titanium alloy and of a butt welded joint in this alloy (PT-2V filler material) was investigated on cylindrical specimens 7 mm in diameter with a gage length of 50 mm. The plane of the weld 10-mm wide, produced by manual submerged-arc welding, was situated in the center of the specimen in the direction normal to its longitudinal axis. The results show that in the examined cyclic stress amplitude range the preliminary cyclic loading lasting 5·104cycles with a frequency of 35 Hz increases the cyclic creep limit of PT-3V alloy by 11% and the static creep limit of the welded joint by 19%. This variation of the mechanical properties can be regarded as one of the reasons for the positive effect of the vibrotreatment technology, used in industry, leading to stabilization of the dimensions and form of components.
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