Decomposition Staging of β-metastable Solid Solution in (α+β) Titanium Alloy During Heating

Abstract

The decomposition of β-metastable phase in (α+β)-titanium alloys during continuous heating needs a detailed investigation in the range of relatively small temperatures. The staging of β-solid solution decay was studied on the solution treated and water quenched VT16 (Ti-3Al-5Mo-5V) used for fasteners production. The thermal exo-effects of β-phase decomposition were examined using DSK. Corresponding effects in the in situ X-Ray diffraction patterns and storage modulus temperature dependence in the DMA curves are discussed. A three stage layout of β-decay is reported during continuous heating of VT16 with (α+β)-structure after quenching.