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The Equilibrium Diagram of the Ti-Al System

1960; Japan Institute of Metals and Materials; Volume: 1; Issue: 1 Linguagem: Inglês

10.2320/matertrans1960.1.22

2432-4701

Tomoo Sato, Y. C. Huang,

Aluminum Alloys Composites Properties

The titanium-rich side phase diagram of the Ti-Al system has been re-examined. Electrical resistance measurements, X-ray analysis and microscopic observations were carried out to determine the equilibrium relations among the inter-solid phases. A partial phase diagram up to 50% Al by weight was constructed as shown in Fig. 16. The Al-saturated α-Ti solid solution exists conjugately with the α2 phase for the temperature range below 1020°C, at which temperature a peritectoid reaction, β-Ti+α2\ ightleftharpoonsα-Ti, takes place. The α2 phase exists in the range from 19 to 25% Al by weight and it corresponds to Ti2Al. One new phase named δ has been assumed to exist in the composition range from 26 to 34% Al by weight at high temperatures.The non-variant reactions in the solid alloys of this system were determined as follows;(Remark: Graphics omitted.)