Journal of Materials Science, Vol.35, No.22, 5609-5612, 2000
Microstructure and properties of burn-resistant Ti-Al-Cu alloys
Ti-Al-Cu series burn-resistant alloys are newly developed materials which have low density, low cost and are easy to process. The results show that Ti-Al-Cu alloys have good burn resistance due to their good thermal conductivity, low melting point, and the existence of Ti2Cu phase which also has a very low melting point. Ti-Al-Cu alloys have excellent thermal processability and good room and high temperature tensile properties, but an increase in copper content harms their thermal stability. After thermal exposure for a long time, Ti2Cu phase will coalesce and coarsen, but the addition of Si and Al will be useful for their thermal stability. The Ti-13Cu-1Al-0.2Si alloy has good thermal stability at 540 degreesC and good creep resistance at 300 degreesC and 100 MPa. The phases of Ti-Al-Cu alloys were found to be composed of alpha phase and Ti2Cu. The character of the Ti2Cu phase changes with the increasing copper content.