Issue 48

J. Christopher et alii, Frattura ed Integrità Strutturale, 48 (2019) 554-562; DOI: 10.3221/IGF-ESIS.48.53 562 [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 t e in 0 r0 r i0 Total appliedstrain rate b Burgers vector Elasticstrain rate M Taylorsfactor Inelasticstrain rate s, and t Constants involved in Model-I t Hold time Initial relaxationstress Relaxationstress Initial inte           0 m i 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 