1993 Volume 79 Issue 4 Pages 531-536
Microstructures of thermomechanically processed Ti-40 50at%Al alloys have been studied with respect to the effect of Al-content and isothermal hot-working temperature. Thermomechanical processing of the alloys have been found to result in five different types of microstructures depending on Al-content and hot-working temperature. The regions corresponding to the five different microstructure types have been depicted in the Ti-Al binary system. Characteristics of each type of microstructure and factor determining the boundaries between the regions have been discussed on the basis of the results of optical and transmission electron microscopic observations.