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  On the nucleation of Laves phase particles during high-temperature exposure and creep of tempered martensite ferritic steels

Isik, M. I., Kostka, A., & Eggeler, G. (2014). On the nucleation of Laves phase particles during high-temperature exposure and creep of tempered martensite ferritic steels. Acta Materialia, 81, 230-240. doi:10.1016/j.actamat.2014.08.008.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-B500-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-B501-0
Genre: Journal Article

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 Creators:
Isik, M. I.1, Author              
Kostka, A.2, Author              
Eggeler, G.3, Author              
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
2High-Temperature Materials, External Max Planck Fellow, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863347              
3 Institut für Werkstoffe, Ruhr-Universität Bochum, Bochum, Germany , ou_persistent22              

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Free keywords: Atom probe tomography; Creep; Laves phase; Tempered martensite ferritic steels; Transmission electron microscopy
 Abstract: This paper reports on the formation of an Mo-rich Laves phase during high-temperature exposure and creep of a tempered martensite ferritic steel with 12 wt.% Cr and 1 wt.% Mo. The material was exposed to 550 degrees C for time intervals between 864 and 81,984 h. For comparison, a few creep tests were carried out at 550 degrees C and 120 MPa (duration between 864 and 12,456 h). All tests were interrupted after specific time periods and microstructures were investigated using transmission electron microscopy and atom probe tomography. Laves phase formation occurs during both heat treatment and creep. Creep stress and strain have no significant effect on the early stages of Laves phase formation. In the present work we show that prior to Laves phase nucleation Si and Mo segregate to micrograin boundaries, where subsequently Laves phase particles appear next to M23C6 carbides. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2014-12
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
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Publ. Info: Tarrytown, NY : Pergamon
Pages: - Volume / Issue: 81 Sequence Number: - Start / End Page: 230 - 240 Identifier: ISSN: 1359-6454
CoNE: /journals/resource/954928603100