The development of creep damage constitutive equations for high Cr steel

Xuming Zheng, Qiang Xu, Joan Lu, Xue Wang, XiQiao Feng

Research output: Contribution to journalArticle

Abstract

This paper reports (1) an application of the modified hyperbolic sine law to P92 for the minimum creep strain rate over a wider range of stress level, and 2) the calibration of the creep cavity fracture model and its applications to such as P92, E911 and MARBN alloys. It was motivated by the original development of creep cavitation based creep rupture model and application to other alloys, and the need of creep strain and stress relation over a wider range of stress. The results include: (1) the calibration of creep cavity fracture model for E911, and the pre-required cavity nucleation and growth models, for E911, (2) the creep lifetime and stress relation coefficient U’ for P92, and (3) the relationship of the cavity nucleation rate coefficient A2 and stress level for MARBN cross-welds. This paper contributes to the specific knowledge and the methodology. It anticipates that this methodology will find its value and application in modelling other fractures such as ductile and fatigue.
Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalMaterials at High Temperatures
Volume37
Issue number2
Early online date1 Feb 2020
DOIs
Publication statusPublished - 1 Mar 2020

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