Supplemental Problem: Creep Elongation
A specimen 605 mm long of an S-590 alloy is to be exposed to a tensile stress of 200 MPa at 730°C.
1000 800 600
650 730
400
200 stress (MPa) 100 80 60
815
925
40
20d 10^6 10^-5 10^-4 10^-3 10^-2 10^-1 1 Steady-state creep rate (h^-1)
10
10^2 10
Using the above figure, determine the specimen elongation after 52 hours. Assume that the total of both instantaneous and primary creep elongations is 2.9 mm.
mm
The tolerance is +/-9%.