Effect of heating temperature on the formation of structure and phase composition of a biocompatible alloy Ti–6Al–4V–ELI subjected to equal-channel angular pressing

Abstract

The changes in the structure, phase composition, and in the microhardness after heating in the temperature range of 600–1000°C and subsequent quenching in a Ti–6Al–4V–ELI alloy preliminarily subjected to equal-channel angular pressing at 600°C have been studied by methods of structural analysis, X-ray diffraction analysis, and microdurometry. The presence of the α₂ phase in the deformed alloy has been detected. The diagram of the change in the phase composition of the alloy upon quenching was constructed. The interrelation between the character of structural and phase transformations, and the level of the microhardness of the alloy after quenching from different temperatures has been found.