Effects of Laves phase particles on recovery and recrystallization behaviors of Nb-containing FeCrAl alloys

Zhiqian Sun; Philip D. Edmondson; Yukinori Yamamoto

doi:10.1016/j.actamat.2017.11.027

Effects of Laves phase particles on recovery and recrystallization behaviors of Nb-containing FeCrAl alloys

Zhiqian Sun, Philip D. Edmondson, Yukinori Yamamoto

Alloy Behavior & Design

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

137 Scopus citations

Abstract

The microstructures and mechanical properties of deformed and annealed Nb-containing FeCrAl alloys were investigated. Fine dispersion of Fe₂Nb-type Laves phase particles was observed in the bcc-Fe matrix after applying a thermomechanical treatment, especially along grain/subgrain boundaries, which effectively stabilized the recovered and recrystallized microstructures compared with the Nb-free FeCrAl alloy. The stability of recovered areas increased with Nb content up to 1 wt%. The recrystallized grain structure in Nb-containing FeCrAl alloys consisted of elongated grains along the rolling direction with a weak texture when annealed below 1100 °C. An abnormal relationship between recrystallized grain size and annealing temperature was found. Microstructural inhomogeneity in the deformed and annealed states was explained based on the Taylor factor. Annealed Nb-containing FeCrAl alloys showed a good combination of strength and ductility, which is desirable for their application as fuel cladding in light-water reactors.

Original language	English
Pages (from-to)	716-727
Number of pages	12
Journal	Acta Materialia
Volume	144
DOIs	https://doi.org/10.1016/j.actamat.2017.11.027
State	Published - Feb 1 2018

Funding

The authors wish to thank Cecil Carmichael, Gregory Cox, David Harper, Kevin Hanson, Dustin Heidel, and Daniel Moore for their help in materials preparation and processing. We also appreciate Kurt Terrani's support as the program manager. This research was funded by the US Department of Energy's Office of Nuclear Energy , Advanced Fuel Campaign of the Nuclear Technology R&D program , under contract DE-AC05-00OR22725 with UT-Battelle, LLC. Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the U.S. Department of Energy . The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725

Keywords

EBSD
FeCrAl alloys
Laves phases
Recrystallization
Texture

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10.1016/j.actamat.2017.11.027

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title = "Effects of Laves phase particles on recovery and recrystallization behaviors of Nb-containing FeCrAl alloys",

abstract = "The microstructures and mechanical properties of deformed and annealed Nb-containing FeCrAl alloys were investigated. Fine dispersion of Fe2Nb-type Laves phase particles was observed in the bcc-Fe matrix after applying a thermomechanical treatment, especially along grain/subgrain boundaries, which effectively stabilized the recovered and recrystallized microstructures compared with the Nb-free FeCrAl alloy. The stability of recovered areas increased with Nb content up to 1 wt%. The recrystallized grain structure in Nb-containing FeCrAl alloys consisted of elongated grains along the rolling direction with a weak texture when annealed below 1100 °C. An abnormal relationship between recrystallized grain size and annealing temperature was found. Microstructural inhomogeneity in the deformed and annealed states was explained based on the Taylor factor. Annealed Nb-containing FeCrAl alloys showed a good combination of strength and ductility, which is desirable for their application as fuel cladding in light-water reactors.",

keywords = "EBSD, FeCrAl alloys, Laves phases, Recrystallization, Texture",

author = "Zhiqian Sun and Edmondson, {Philip D.} and Yukinori Yamamoto",

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T1 - Effects of Laves phase particles on recovery and recrystallization behaviors of Nb-containing FeCrAl alloys

AU - Sun, Zhiqian

AU - Edmondson, Philip D.

AU - Yamamoto, Yukinori

PY - 2018/2/1

Y1 - 2018/2/1

N2 - The microstructures and mechanical properties of deformed and annealed Nb-containing FeCrAl alloys were investigated. Fine dispersion of Fe2Nb-type Laves phase particles was observed in the bcc-Fe matrix after applying a thermomechanical treatment, especially along grain/subgrain boundaries, which effectively stabilized the recovered and recrystallized microstructures compared with the Nb-free FeCrAl alloy. The stability of recovered areas increased with Nb content up to 1 wt%. The recrystallized grain structure in Nb-containing FeCrAl alloys consisted of elongated grains along the rolling direction with a weak texture when annealed below 1100 °C. An abnormal relationship between recrystallized grain size and annealing temperature was found. Microstructural inhomogeneity in the deformed and annealed states was explained based on the Taylor factor. Annealed Nb-containing FeCrAl alloys showed a good combination of strength and ductility, which is desirable for their application as fuel cladding in light-water reactors.

AB - The microstructures and mechanical properties of deformed and annealed Nb-containing FeCrAl alloys were investigated. Fine dispersion of Fe2Nb-type Laves phase particles was observed in the bcc-Fe matrix after applying a thermomechanical treatment, especially along grain/subgrain boundaries, which effectively stabilized the recovered and recrystallized microstructures compared with the Nb-free FeCrAl alloy. The stability of recovered areas increased with Nb content up to 1 wt%. The recrystallized grain structure in Nb-containing FeCrAl alloys consisted of elongated grains along the rolling direction with a weak texture when annealed below 1100 °C. An abnormal relationship between recrystallized grain size and annealing temperature was found. Microstructural inhomogeneity in the deformed and annealed states was explained based on the Taylor factor. Annealed Nb-containing FeCrAl alloys showed a good combination of strength and ductility, which is desirable for their application as fuel cladding in light-water reactors.

KW - EBSD

KW - FeCrAl alloys

KW - Laves phases

KW - Recrystallization

KW - Texture

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JO - Acta Materialia

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ER -

Effects of Laves phase particles on recovery and recrystallization behaviors of Nb-containing FeCrAl alloys

Abstract

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Keywords

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