Stress Relaxation Damage Analysis for High Temperature Bolting

Jin Quan Guo; Xiao Hong Sun; Hui Chao Shi

doi:10.4028/www.scientific.net/AMR.455-456.1429

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 455-456Stress Relaxation Damage Analysis for High...

Stress Relaxation Damage Analysis for High Temperature Bolting

Abstract:

The paper analyzes the stress relaxation damage mechanisms of high temperature (HT) bolts of ultra-supercritical steam turbine units. Based on creep damage mechanisms and relaxation characteristics, the paper proposes a life prediction model, and by which to predict relaxation damage life of HT bolting material 1Cr10NiMoW2VNbN. Validation results indicate that the developed model has led to better consistent results with experimental data and thus can be recommended in relaxation life evaluation of HT materials.

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Periodical:

Advanced Materials Research (Volumes 455-456)

Pages:

1429-1433

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.455-456.1429

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Online since:

January 2012

Authors:

Jin Quan Guo, Xiao Hong Sun, Hui Chao Shi

Keywords:

Average Creep Rate, Creep Damage, HT Bolt, Life Assessment Model, Stress Relaxation

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References

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