Application of an advanced mean-field dislocation creep model to P91 for calculation of creep curves and time-to-rupture diagrams

Florian Kerem Riedlsperger; Bernhard Krenmayr; Gerold Zuderstorfer; Bernhard Fercher; Bernd Niederl; Johannes Schmid; Bernhard Sonderegger

doi:10.1016/j.mtla.2020.100760

Application of an advanced mean-field dislocation creep model to P91 for calculation of creep curves and time-to-rupture diagrams

Florian Kerem Riedlsperger^*, Bernhard Krenmayr, Gerold Zuderstorfer, Bernhard Fercher, Bernd Niederl, Johannes Schmid, Bernhard Sonderegger

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

This work deals with the development of a comprehensive mean-field dislocation creep model and its application to the martensitic 9% Cr-steel P91. Microstructural data from literature, EBSD measurements and results from precipitate kinetic simulations serve as input for the creep simulation in addition to material- and physical constants. The model has the capability for calculating creep curves depending on their initial microstructure, stress and temperature and is thus able to deduce time-to-rupture diagrams. Side-result is the microstructural evolution during creep exposure (different types of dislocation densities, subgrains and precipitates). The capability of the model is demonstrated in P91 within the stress range of 50-110 MPa at 650°C. Simulated results agree well with experimental data from sources such as NIMS, ASME, ECCC and industrial data.

Original language	English
Article number	100760
Journal	Materialia
Volume	12
DOIs	https://doi.org/10.1016/j.mtla.2020.100760
Publication status	Published - 1 Aug 2020

Keywords

creep
steel
simulation
precipitate kinetics
dislocation density

ASJC Scopus subject areas

General Materials Science

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10.1016/j.mtla.2020.100760Licence: CC BY 4.0

FWF - Software Development - Software Development on Dislocation Creep in Alloys
Sonderegger, B.
1/07/18 → 31/07/23
Project: Research project

Cite this

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title = "Application of an advanced mean-field dislocation creep model to P91 for calculation of creep curves and time-to-rupture diagrams",

abstract = "This work deals with the development of a comprehensive mean-field dislocation creep model and its application to the martensitic 9% Cr-steel P91. Microstructural data from literature, EBSD measurements and results from precipitate kinetic simulations serve as input for the creep simulation in addition to material- and physical constants. The model has the capability for calculating creep curves depending on their initial microstructure, stress and temperature and is thus able to deduce time-to-rupture diagrams. Side-result is the microstructural evolution during creep exposure (different types of dislocation densities, subgrains and precipitates). The capability of the model is demonstrated in P91 within the stress range of 50-110 MPa at 650°C. Simulated results agree well with experimental data from sources such as NIMS, ASME, ECCC and industrial data.",

keywords = "creep, steel, simulation, precipitate kinetics, dislocation density",

author = "Riedlsperger, {Florian Kerem} and Bernhard Krenmayr and Gerold Zuderstorfer and Bernhard Fercher and Bernd Niederl and Johannes Schmid and Bernhard Sonderegger",

year = "2020",

month = aug,

day = "1",

doi = "10.1016/j.mtla.2020.100760",

language = "English",

volume = "12",

journal = "Materialia",

issn = "2589-1529",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Application of an advanced mean-field dislocation creep model to P91 for calculation of creep curves and time-to-rupture diagrams

AU - Riedlsperger, Florian Kerem

AU - Krenmayr, Bernhard

AU - Zuderstorfer, Gerold

AU - Fercher, Bernhard

AU - Niederl, Bernd

AU - Schmid, Johannes

AU - Sonderegger, Bernhard

PY - 2020/8/1

Y1 - 2020/8/1

N2 - This work deals with the development of a comprehensive mean-field dislocation creep model and its application to the martensitic 9% Cr-steel P91. Microstructural data from literature, EBSD measurements and results from precipitate kinetic simulations serve as input for the creep simulation in addition to material- and physical constants. The model has the capability for calculating creep curves depending on their initial microstructure, stress and temperature and is thus able to deduce time-to-rupture diagrams. Side-result is the microstructural evolution during creep exposure (different types of dislocation densities, subgrains and precipitates). The capability of the model is demonstrated in P91 within the stress range of 50-110 MPa at 650°C. Simulated results agree well with experimental data from sources such as NIMS, ASME, ECCC and industrial data.

AB - This work deals with the development of a comprehensive mean-field dislocation creep model and its application to the martensitic 9% Cr-steel P91. Microstructural data from literature, EBSD measurements and results from precipitate kinetic simulations serve as input for the creep simulation in addition to material- and physical constants. The model has the capability for calculating creep curves depending on their initial microstructure, stress and temperature and is thus able to deduce time-to-rupture diagrams. Side-result is the microstructural evolution during creep exposure (different types of dislocation densities, subgrains and precipitates). The capability of the model is demonstrated in P91 within the stress range of 50-110 MPa at 650°C. Simulated results agree well with experimental data from sources such as NIMS, ASME, ECCC and industrial data.

KW - creep

KW - steel

KW - simulation

KW - precipitate kinetics

KW - dislocation density

U2 - 10.1016/j.mtla.2020.100760

DO - 10.1016/j.mtla.2020.100760

M3 - Article

SN - 2589-1529

VL - 12

JO - Materialia

JF - Materialia

M1 - 100760

ER -

Application of an advanced mean-field dislocation creep model to P91 for calculation of creep curves and time-to-rupture diagrams

Abstract

Keywords

ASJC Scopus subject areas

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Projects

FWF - Software Development - Software Development on Dislocation Creep in Alloys

Cite this