(a) Define cold working, warm working and hot working processes in terms of the melting point. Define rupture strength and modulus of rupture. (b) Draw a time temperature transformation (TTT)

diagram for steel with 0.8% Carbon.Why is it important for heat treatment? Is it the same for all composition or will it be different for different composition? (b) What is the difference between fatigue failure and creep failure? Name two factors that affect creep failure of materials.