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  • Thermal Creep_FeCr

    Rights statement: The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-017-4011-3

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A Physics-Based Crystallographic Modeling Framework for Describing the Thermal Creep Behavior of Fe-Cr Alloys

Research output: Contribution to journalJournal articlepeer-review

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  • W. Wen
  • L. Capolungo
  • A. Patra
  • C.N. Tomé
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<mark>Journal publication date</mark>1/05/2017
<mark>Journal</mark>Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number5
Volume48
Number of pages15
Pages (from-to)2603-2617
Publication StatusPublished
Early online date23/02/17
<mark>Original language</mark>English

Abstract

In this work, a physics-based thermal creep model is developed based on the understanding of the microstructure in Fe-Cr alloys. This model is associated with a transition state theory-based framework that considers the distribution of internal stresses at sub-material point level. The thermally activated dislocation glide and climb mechanisms are coupled in the obstacle-bypass processes for both dislocation and precipitate-type barriers. A kinetic law is proposed to track the dislocation densities evolution in the subgrain interior and in the cell wall. The predicted results show that this model, embedded in the visco-plastic self-consistent framework, captures well the creep behaviors for primary and steady-state stages under various loading conditions. The roles of the mechanisms involved are also discussed.

Bibliographic note

The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-017-4011-3