Creep_0329蠕变
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40
3020
10
Q c (k c a l /m o l )
5.0>m
T T 1 J/mol = 0.239 cal/mol
in most cases, very close to Q sd implying that the rate-controlling process vacancy diffusion controlled.
T≅0.5-0.75T
, Q c≅Q extrinsic of Cl
m
Effect of changing
dislocation density Low temperature region
Diffusion region
@Add alloying element to pure metal Self-diffusion
T = 1000 °C
2.06%
Fe-Fe C phase diagram
Local distortion of the Fe structure in the vicinity of each C atom The interstitial hole in γ-iron is larger than they are in α-iron