Titanium Annealing?

[3743735]

Is Ti 6AL4V harder than annealing?We have Ti 6AL4V

annealing material.When we bend it ,we found crack on its

surface.Before we did it too,but there is no crack .

We suspect this material isn't annealing.Can anyone

answer it ?Thank!

 

[CoryPad]

It is difficult to understand what you wrote. I believe you are asking if alloy Ti-6Al-4V is harder after annealing. Annealing, when properly done, decreases material strength and hardness, and increases plastic strain capacity. Therefore, annealing should provide material that is less likely to crack during forming.

 

[rd400guy]

Ti-6-4 is a heat treatable alloy due to it's dual-phase (alpha-beta) nature. Depending on the temperature at which you "annealed" it, and the hold time, and quench method, you may have actually heat treated and aged the material. RTI has a pretty informative site:

http://www.rti-intl.com

and provides a pretty good explanation of titanium alloys. For specific annealing cycles or heat treatment/aging cycles, consult your supplier.