Bikes and Bike Designs

The 6061 aluminum alloys are one of the heat treatable aluminums. The heat treatment for the T-6 condition usually consists of heating and holding the alloy at high enough temperature to allow the alloying constituents to go into solution. The metal is then quenched which results in a super saturation solution (T0 condition) that is relatively soft. The material is then aged either naturally or artificially to cause some of the alloying constituents to "clump" or precipitate out of solution within the atomic lattice. The clumping action strains the atomic lattice and thereby strengthens the structure. If the material is held at too high a temperature or for too long, the alloy will over age and the constituents will migrate to the grain boundaries and weaken the structure. 

Thank You for answer.

Of course 6061 is heat treatable alloy but I need to know how much material properties will recover after heat treatment especially yeld strength. It's very important for design aluminium structure because weldment is the weakest point. After welding yeld strength in weld zone rapidly decreases. For 6061 T6 it is less than 100 MPa so that's huge issue.