1. T=950 C (see attached file below
2.
a.)
Primary Creep Strain Rate:
Primary creep strain rate is the initial rate of creep accumulation during the transient stage of
creep, characterized by a relatively high strain rate that gradually decreases until it reaches the
steady-state/secondary creep rate.
Minimum Creep Rate:
Minimum creep rate is the lowest strain rate at which significant creep deformation occurs in a
material. It signifies the threshold below which creep is considered negligible and is typically
determined through experimentation or creep testing under different stress loads and
temperature conditions.
Creep Activation Energy:
Creep activation energy enables atomic rearrangements and diffusion processes necessary for
creep deformation in a material. It also measures the temperature sensitivity of creep and is
most of the time determined by analyzing the creep behavior at different temperature settings.
b.)
3 other ways to characterize the creep properties
Instantaneous elastic strain is the strain at which is present elastically in the body at a certain
instant
Rupture Lifetime is the lifetime of material before it fails.
Creep Deformation tells us the deformation at each stage.
HW
IS
"p f
+
=
273)20 lagtr
+
+
No
log(210)
( 273)(20
+
27 3
-
=
+
10