Effect of Heat Treatment Conditions on the Morphology of α Phase and Mechanical Properties In Ti-10V-2Fe-3Al Titanium Alloy/ Wp?yw Warunków Obróbki Cieplnej Na Morfologie Fazy α I W?asno?ci Mechaniczne W Stopie Tytanu Ti-10V-2Fe-3Al

摘要

The influence of heat treatment on the microstructure and mechanical properties was studied in the Ti-10V-2Fe-3Al titanium alloy for two heat treatment schemes (α + β) and β + (β + α), which resulted in different morphologies of the α phase. Scheme I resulted in the α-phase of globular morphology, whose volume fraction did not change much during annealing. Scheme II led to obtaining a needle-like α-phase, whose amount increased together with heating time. The phenomenon of stress-induced martensitic transformation was observed in the material with needle-like morphology annealed for 15 and 30 min. Longer times of annealing effected in the decay of that transformation, provided the volume fraction of α-phase exceeded 50%.