科研之友
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摘要
alpha+beta titanium alloys have been widely used in many industrial fields. Two novel alloys with the name of Ti-6Al-4Me(Cr, Mo) have been fabricated in laboratory scale. beta phase solution heat treatment and high temperature aging were performed to study the microstructure variations. A systematic microstructural investigation has been carried out. The results show that samples soaked in b phase field, alpha' martensite were formed during the quenching, but in Ti-6Al-4Cr alloy, the microstructure is more uniform. After aging treatment, both alloys present a typical Widmanstatten microstructure. With the increase of the aging temperature, the size of alpha platelet in Ti-6Al-4Cr alloy coarse more apparently as compare to the Ti-6Al-4Mo alloy. Furthermore, in Ti-6Al-4Cr alloy, samples with 600 degrees C aging, TiCr2 Laves phase was observed along the alpha/beta interface, and in some part of a phase, special Cr solid solution bands were also found.
