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Creep Modelling of P91 Steel for High Temperature Power Plant Applications

Authors
Journal
Procedia Engineering
1877-7058
Publisher
Elsevier
Volume
55
Identifiers
DOI: 10.1016/j.proeng.2013.03.326
Keywords
  • Creep
  • Damage Mechanics
  • Dislocation Density
  • Constitutive Equation

Abstract

Abstract There has been considerable interest in the development of continuum damage (CDM) mechanism based model for creep life predictions of 9CrMoNbV steel. It is reported that the steel has high dislocation density in normalized and tempered condition whereas with creep exposure it goes down significantly. The paper examines one of the recent models and attempts to incorporate this as an additional damage parameter. This has resulted in much better prediction of creep stain time plots for this steel.

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