Creep Based Prediction Model of Stress Relaxation Behavior for High Temperature Materials

Jin Quan Guo; Li Xin Wang; Fu Zhen Xuan

doi:10.4028/www.scientific.net/AMR.139-141.356

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 139-141Creep Based Prediction Model of Stress Relaxation...

Creep Based Prediction Model of Stress Relaxation Behavior for High Temperature Materials

Abstract:

An average creep rate conversion model based on Schlottner-Seeley creep assessment procedure and creep damage equation has been developed by considering the relationship that two stages of stress relaxation are corresponding to the first and the second creep stage respectively and the effect of these two kinds of creep rate on relaxation, and stress relaxation is creep at various stresses. And an incremental calculation prediction methodology of stress relaxation performance was established. The predicted results are compared with the data of stress relaxation tests conducted on bolting steel 1Cr10NiMoW2VNbN used in ultra-supercritical turbines. Validation results indicate that the developed model has led to better consistent results with the measured data and thus can be recommended in stress relaxation behavior prediction of high temperature materials.

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Periodical:

Advanced Materials Research (Volumes 139-141)

Pages:

356-359

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.139-141.356

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Online since:

October 2010

Authors:

Jin Quan Guo, Li Xin Wang, Fu Zhen Xuan

Keywords:

Creep Rate Model, Creep-Relaxation Conversion, High Temperature Material, Prediction Methods, Stress Relaxation Performance

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References

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