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Assessment of potential service-life performance for MarBN steel power plant header under flexible thermomechanical operations

Benaarbia, A.; Morris, A.; Li, Ming; Sun, W.

Authors

A. Benaarbia

A. Morris

MING LI MING.LI@NOTTINGHAM.AC.UK
Assistant Professor

W. Sun



Contributors

Ming Li
Researcher

Andy Morris
Other

Wei Sun
Supervisor

Adil Benaarbia
Other

Abstract

This paper is concerned with the service-life assessment of 9Cr steels superheater outlet steam header subjected to realistic subcritical and future ultra-super critical flexible operating conditions. The proposed methodology is achieved via a combined program of high temperature strain-controlled fatigue tests, temperature- and time-dependent unified viscoplastic model for thermomechanical fatigue analysis, and Smith-Watson-Topper critical plane criterion for multi-axial life prediction. Samples of idealised operational transients with particular attention on the starting-up cycle is fully coupled with the computational modelling of header component for the high temperature performance assessment. The predicted results indicate that: (i) the header shell inner-bore saddles at weld regions are the critical locations that lead to earlier potential fatigue crack initiation, and (ii) the predicted lifetime under subcritical conditions correlates reasonably with the industrial experience. A steam header manufactured from MarBN operating under ultra-super critical condition is shown to have comparable life performance with the P91 header operating under subcritical condition.

Citation

Benaarbia, A., Morris, A., Li, M., & Sun, W. (2020). Assessment of potential service-life performance for MarBN steel power plant header under flexible thermomechanical operations. International Journal of Fatigue, 135, https://doi.org/10.1016/j.ijfatigue.2020.105565

Journal Article Type Article
Acceptance Date Feb 24, 2020
Online Publication Date Feb 25, 2020
Publication Date 2020-06
Deposit Date Feb 24, 2020
Publicly Available Date Feb 26, 2021
Journal International Journal of Fatigue
Print ISSN 0142-1123
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 135
Article Number 105565
DOI https://doi.org/10.1016/j.ijfatigue.2020.105565
Keywords Mechanical Engineering; Modelling and Simulation; Industrial and Manufacturing Engineering; General Materials Science; Mechanics of Materials
Public URL https://nottingham-repository.worktribe.com/output/4026979
Publisher URL https://www.sciencedirect.com/science/article/pii/S0142112320300967?via%3Dihub
Additional Information This article is maintained by: Elsevier; Article Title: Assessment of potential service-life performance for MarBN steel power plant header under flexible thermomechanical operations; Journal Title: International Journal of Fatigue; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijfatigue.2020.105565; Content Type: article; Copyright: © 2020 The Authors. Published by Elsevier Ltd.

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/





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