Question

X Your answer is incorrect. A cylindrical component 75 mm long constructed from an 5-590 alloy (Animated Figure) is to be exposed to a tensile load of 20,000 N. What minimum diameter is required for it to experience an elongation of no more than 10.2 mm after an exposure for 1250 h at 815°C? Assume that the sum of instantaneous and primary creep elongations is 0.7 mm. 29.14

Answer 1

solt hirem, hength of cylinder L = 75mm Tensile load, f = 2000N Total elongation, exot = 10.2 mm Sum of primary & instantaneous elongation, epte; = 0. The team Enposuus time, t= izroh Tempunture, T = 815°C Now, - steady-state elongation, ea exot-(eptei) e=(10.2 - 0.78mm ezg.6mm Now steady, state strain, E = e = get more than E = 0.128 mm steady-state shain zade, & & í . 0.128 mm 0, 128 mm 1250h = 1.024 X10** mm) to Now, find the value of stres from the shrey versus steady state creep date for an s. 590 alley at Ees'c & 1.024 x 10-4 mm/h steady-stain sate. { from the graph anailable on net } Hence nolue of stress is 120MPa i e r=12oxiofe

Now, stres, a force = 2omo Ara ed² i 120*10^- 2 orroo 4, abd2 d? 21123 4104 m2 do 0.01457 m 3.il milero mu do 14.57 mm {'11 m = vero muy 14.57 mm Hence, Minimum diametu required is 14.57mm.
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