Microstructure and mechanical properties of Ti-40 Wt Pct Ta (Ti-15 At. Pct Ta)

摘要: Of the β-isomorphous Ti-X alloy systems, Ti-Ta is one of least studied. In current work, microstructure and mechanical properties Ti-40 wt pct Ta (Ti-15 at. Ta) are investigated. Annealing at 810 °C produces a two-phase consisting Ti-richa idiomorphs in continuous Ta-rich β matrix; this suggests β-transus temperature higher than indicated by most recently published phase diagram. Water quenching from causes to partially transform orthorhombic martensite (α), while furnace cooling yields secondarya The primary α formed isothermally remains unchanged both cases. Subsequent aging transformation type 1a plus residual β, with corresponding increase strength decrease ductility. maximum ductility (20 elongation) occurs water-quenched condition which metastable retained. Analysis true stresstrue strain data that transformation-induced plasticity may contribute enhanced material.