Deformation characteristics of a high chromium, power plant steel at elevated temperatures

Brian J. Golden, Dong Feng Li, Peter Tiernan, Stephen Scully, Noel P. O'Dowd

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The changing face of power generation requires an improved understanding of the deformation and failure response of materials that are employed in power plants. Important insights can be obtained through microstructurally motivated modelling studies. With the drive for increased efficiency, there is a corresponding drive towards increasing operating temperatures in conventional power plant. With these increasing temperatures, and with the increased flexibility required of modern power plant working in a mixed energy economy, more robust material testing and modelling tools are required to accurately predict the response of power plant steels. This works deals with the development of a material model for a martensitic steel, P91, relevant to the range of temperatures typically seen in a modern power plant. High temperature (20, 400, 500, 600°C) tensile testing at various strain rates was carried out the steel. Tests were taken to failure and the stress strain response recorded. Electron backscatter diffraction (EBSD) is employed to determine the complex microstructure of the P91 material. This information is incorporated within a representative volume element (RVE) and a nonlinear, rate dependent, finite strain crystal plasticity model used to represent the deformation of the material. The material model was calibrated to each temperature and strain rate to give a robust physically based model that has been fully validated through experimental data.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791857007, 9780791857007, 9780791857007, 9780791857007
DOIs
Publication statusPublished - 2015
EventASME 2015 Pressure Vessels and Piping Conference, PVP 2015 - Boston, United States
Duration: 19 Jul 201523 Jul 2015

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6B-2015
ISSN (Print)0277-027X

Conference

ConferenceASME 2015 Pressure Vessels and Piping Conference, PVP 2015
Country/TerritoryUnited States
CityBoston
Period19/07/1523/07/15

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