Question

The Ti-6Al-4V alloy is the most widely used Ti alloy in space applications. It belongs to the group of + Ti Alloys. It is characterized with high yield strength, high fatigue resistance, good corrosion resistance, high elastic modulus and good high-temperature stability. In a fully lamellar microstructure, its mechanical properties mainly depend on the lamellae thickness and the colony size. The smaller the lamellae thickness and colony size are, the better the overall mechanical properties. The following is the pseudo-binary phase diagram of Ti-Al-V with the location of the Ti-6Al-4V alloy identified. If you are given an as-solidified Ti-6Al-4V alloy, please advise a thermomechanical processing route to obtain the good overall mechanical properties. (30 points)

Answer 1