Characterization of (α+β)/β Transformation in a TC11 Titanium Alloy

Lin Geng; Bin Xu; Y.T. Li; Ai Bin Li; Gui Song Wang

doi:10.4028/www.scientific.net/SSP.127.91

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HomeSolid State PhenomenaSolid State Phenomena Vol. 127Characterization of (α+β)/β Transformation in a...

Characterization of (α+β)/β Transformation in a TC11 Titanium Alloy

Abstract:

(α+β)/β phase transformation temperature of a TC11 titanium alloy was confirmed to be 1035°C, which was obtained by three methods including the calculation method, differential scanning calorimetry and metallographic techniques. Based on this result, annealing treatments below and above the (α+β)/β phase transformation temperature were carried out, and the microstructure of the TC11 alloys before and after annealing treatment was analyzed by SEM. The result showed that conventional annealing below 1035°C does not change the Widmanstaten structure of TC11 alloy, though the thickness of α lamellar structure becomes thicker with increasing the annealing temperature. The microstructure of the TC11 alloy treated by annealing above the α+β/β transformation temperature is non-uniform because of the different forming temperature and growing duration of α phase in the TC11 alloy.