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

Abstract:

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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.

Info:

Periodical:

Advanced Materials Research (Volumes 139-141)

Edited by:

Liangchi Zhang, Chunliang Zhang and Tielin Shi

Pages:

356-359

DOI:

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

Citation:

J. Q. Guo et al., "Creep Based Prediction Model of Stress Relaxation Behavior for High Temperature Materials", Advanced Materials Research, Vols. 139-141, pp. 356-359, 2010

Online since:

October 2010

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Price:

$35.00

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