The paper reports on a study of the kinetics of phase transformations during continuous cooling of the diphase Ti6Al4V titanium alloy from the diphase + range (950 C). It has been found that within the whole range of applied cooling rates a diffusional transformation occurred. Metallographic observations of the alloy's microstructure gave evidence of changes in the phase morphology. Upon cooling at between 7.1 and 0.9 C/s the phase precipitates show lamellar character (Widmannsttten structure), while at the slowest rates (0.230.011 C/s) the phase precipitates in a form of grains. Besides microstructural changes, dilatometric effects were also observed which corroborates occurrence of phase transformations in the alloy.
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R. Dąbrowski (2011) studied this question.