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Growing Science » Engineering Solid Mechanics » Hot workability characteristics of two A335 P92 steels for power plant application: A comparative study

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Engineering Solid Mechanics

ISSN 2291-8752 (Online) - ISSN 2291-8744 (Print)
Quarterly Publication
Volume 11 Issue 3 pp. 311-324 , 2023

Hot workability characteristics of two A335 P92 steels for power plant application: A comparative study Pages 311-324 Right click to download the paper Download PDF

Authors: J.O. Obiko, L.H. Chown, D.J. Whitefield, M.O. Bodunrin

DOI: 10.5267/j.esm.2023.2.001

Keywords: Metal workability, Flow stress, Constitutive equation, Metal forming, P92 steel

Abstract: The article reports on the workability of two P92 steels having a chromium content of 8.29 and 9.48 wt%. Constitutive equations were used to calculate material parameters describing the hot deformation flow stress. Hot deformation tests were conducted using the Gleeble® 3500 thermomechanical facility. Test conditions were: temperature of 850-1000°C and strain rate of 0.1-10s-1 to a strain of 0.5. The flow stress curve results show that dynamic recovery was the only softening mechanism. A comparative study of the two steels revealed that Cr content had a marginal significance on the flow stress behaviour. Constitutive analysis results of the material parameters were: a stress exponent of 9.0 (P92-A), and 11.0 (P92-B), while the activation energy was 369 kJmol-1 (P92-A), and 472 kJmol-1 (P92-B). A brief explanation of the material parameter results is in this article. A flow stress model was developed to predict the flow stress behaviour of the two P92 steels investigated. The results show that the model accurately predicts the flow stress at all the deformation conditions applied. The statistical parameters showed a good correlation between the predicted and the experimental data. Therefore, this model can be used to develop metal forming schedules for industrial applications.

How to cite this paper
Obiko, J., Chown, L., Whitefield, D & Bodunrin, M. (2023). Hot workability characteristics of two A335 P92 steels for power plant application: A comparative study.Engineering Solid Mechanics, 11(3), 311-324.

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Journal: Engineering Solid Mechanics | Year: 2023 | Volume: 11 | Issue: 3 | Views: 981 | Reviews: 0

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