Answer Happy

a component alloy in service made of 80 A alloy is subjected to a stress of 210 Mpa and a temperature of 580 degreeC for 25 hours per week, and for 30 hours in each month, it is subjected to 120 Mpa at a temperature of 650 degreeC. a) If a safety factor of 20 on life is required, what is the useful service life? b) If a stress factor of safety of 1.5 is required, what is the useful life to the component? c) Under given operating conditions, what increase in temperature would be required to fail it at a useful life of part b? Consider same temperature increase for both load conditions given.