Deformation Of Titanium Alloy Research Articles

Durability of titanium alloy in vacuum at low and elevated temperatures

1. In the cyclic deformation of titanium alloy, we observe a marked increase in lifetime in the case of tests in vacuum. Apparently loading in vacuum gives more uniform distribution of plastic deformation in these conditions. 2. If the surface is prehardened by rolling, vacuum has almost no effect on the lifetime of the alloy under cyclic deformation. 3. The increase of lifetime at low temperatures and the experimental method involve an increase in the static strength of the alloy. In these conditions the main contribution to the lifetime is made by the initial stages of the process of fatigue failure up to the formation of macrofissures.

Fracture toughness and deformation of titanium alloys at low temperatures

Experimental data concerning the influence of compositional, microstructural and textural variations on the fracture toughness and deformation kinetics of α and α-β titanium alloys are presented. In particular, the influence of these parameters on the thermal and athermal components of the flow stress is compared to their influence on fracture toughness. The similarities in deformation behavior among alloys are noted and contrasted to the dissimilarities in fracture toughness behavior.