Issue 48
J. Christopher et alii, Frattura ed Integrità Strutturale, 48 (2019) 554-562; DOI: 10.3221/IGF-ESIS.48.53
[19] Praveen, C., Christopher, J. and Choudhary B. K. (2017). Critical Assessment of Short-Term Stress-Relaxation Studies for the Prediction of Creep Properties of P91 Steel, Trans. Ind. Inst. Met., 70 (3), pp. 655-660. DOI:10.1007/s12666-017-1090-1.
N OMENCLATURE
Total appliedstrain rate
b
Burgers vector
t
Elasticstrain rate Inelasticstrain rate
M Taylorsfactor
e
s, and t Constants involved in Model-I
in
0
t
Hold time
Initial relaxationstress
r0
r rnal stress C Effectivemodulusof sample-machinesystem m Power law exponent Characteristicstrain rate h Power law co-efficient Mobiledislocation density Shear modulus Q Activation energy R Gas constant Internal stress D Debyefrequency V Activation volume k Boltzmann's constant T Temperature i0 Relaxationstress Initial inte 0 m i
562
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