Back to Search
Start Over
Prediction of deformation and failure of modified 9Cr–1Mo steel under creep-fatigue interaction
- Source :
- Materials at High Temperatures. 29:280-292
- Publication Year :
- 2012
- Publisher :
- Informa UK Limited, 2012.
-
Abstract
- Plant components often undergo loadings which have aspects of both fatigue and creep by experiencing repeated start-up/shut-downs between steady-state operation at high temperature. In such a case, structural materials show inelastic deformation different from that observed under pure fatigue or pure creep conditions. This finding prompted the development of “unified” constitutive models in which cyclic and creep deformations are treated in a unified way. The author’s group has been developing such a unified model for modified 9Cr–1Mo steel which is widely used in ultrasupercritical fossil power plants. Although the latest model has been demonstrated to be capable of describing deformation behaviour under various loading conditions, including cyclic and steady-state loadings, the model still has room for improvement, such as the need to represent accelerated deformation in the tertiary creep regime. In this study, an attempt is made to improve the capability of the model from various perspectives. A failu...
- Subjects :
- Plant Components
Structural material
Materials science
business.industry
Mechanical Engineering
Metals and Alloys
Inelastic deformation
Unified Model
Structural engineering
Creep fatigue
Condensed Matter Physics
Creep
Mechanics of Materials
Materials Chemistry
Ceramics and Composites
Deformation (engineering)
business
Subjects
Details
- ISSN :
- 18786413 and 09603409
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Materials at High Temperatures
- Accession number :
- edsair.doi...........109f514b5a7c884e998251a30b046497