Ti-6AL-4V Grade 5 Titanium in plate :what is its property description

When Ti-6AL-4V Grade 5 Titanium is heated to 1020 ℃, the high-temperature microstructure of the alloy is single-phase β(One of 3 Classifications), which is thought to be a solid solution.

We introduce titanium alloy by organization classification, there are only three types, α, (α+ β) and β. among α Type and β After heating and cooling, the crystal form of Ti alloy remains unchanged, only when it contains a certain range of alloying elements（ α+β） Type titanium alloy, when heating temperature higher equates to phase transformation temperature, During rapid cooling β The phase has a martensitic transformation. Due to different heating temperatures and cooling rates, different microstructures will be obtained, so they have different mechanical properties. it is very important. When using titanium alloy to produce various equipment and parts, if there is a thermal effect, the phase transformation in the alloy must be considered.

When Ti-6AL-4V Grade 5 Titanium in the plate is cooled at different cooling rates, such as quenching-in water, air cooling, and furnace cooling, the microstructure obtained is different, the microstructure of WQ is martensite α’+β Phase, AC tissue is needle-like α+β Phase and primitive β Grain boundary phase, FC structure is strip α+β Phase and primitive β Phase boundary.

As in the above case, when heated to 950 degrees and 850 degrees, the microstructure of Ti-6AL-4V Grade 5 Titanium in plate obtained after cooling at different cooling rates is also different. At 950 ℃, the microstructure of WQ is primary equiaxed α Phase harmony α’+β Phase, AC tissue is primary equiaxed α Phase and acicular β Phase, FC structure is equiaxed α Phase and grain boundary β Phase. At 850 ℃, WQ is primary equiaxed α Phase and metastable β Phase, AC tissue is primary equiaxed α Phase and transformed β Phase.

After the Ti-6AL-4V Grade, 5 Titanium in the plate is heated to 1020 ℃, 950 ℃, and 850 ℃, it is cooled at different cooling rates. See Table 1 for its room temperature mechanical properties: