期刊
MATERIALIA
卷 12, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtla.2020.100760
关键词
Creep; steel; simulation; precipitate kinetics; dislocation density
资金
- Austrian Science Fund (FWF) within project Software Development on Dislocation Creep in Alloys [P31374]
- Austrian Science Fund (FWF) [P31374] Funding Source: Austrian Science Fund (FWF)
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 degrees C. Simulated results agree well with experimental data from sources such as NIMS, ASME, ECCC and industrial data. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Acta Materialia Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
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