Microstructural control of FeCrAl alloys using Mo and Nb additions

Zhiqian Sun; Hongbin Bei; Yukinori Yamamoto

doi:10.1016/j.matchar.2017.08.008

Microstructural control of FeCrAl alloys using Mo and Nb additions

Zhiqian Sun, Hongbin Bei, Yukinori Yamamoto

Alloy Behavior & Design

Oak Ridge National Laboratory

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

100 Scopus citations

Abstract

The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied. Fine and uniform recrystallized grain structures (~ 20–30 μm) were achieved in both alloys through suitable annealing after warm-rolling. The formation of Fe₂Nb-type Laves phase precipitates in the Nb-containing FeCrAl alloy effectively stabilized the deformed and recrystallized microstructures. The Mo-containing FeCrAl alloy exhibited strong γ texture fiber after annealing at 650–900 °C, whereas the annealed Nb-containing FeCrAl alloy had much weaker texture. Both strength and ductility decreased as the grain size increased in both alloys.

Original language	English
Pages (from-to)	126-131
Number of pages	6
Journal	Materials Characterization
Volume	132
DOIs	https://doi.org/10.1016/j.matchar.2017.08.008
State	Published - Oct 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Inc.

Funding

Authors want to thank Cecil Carmichael, Gregory Cox, and David Harper for their help on materials preparation and processing, and Kevin Field and Maxim Gussev for their comments on the manuscript. We are also appreciative of 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 Fuel Cycle R&D program.

Funders	Funder number
Cecil Carmichael
U.S. Department of Energy

Keywords

Annealing
Electron backscattering diffraction (EBSD)
FeCrAl alloys
Hall-Petch effect
Texture

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10.1016/j.matchar.2017.08.008

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abstract = "The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied. Fine and uniform recrystallized grain structures (~ 20–30 μm) were achieved in both alloys through suitable annealing after warm-rolling. The formation of Fe2Nb-type Laves phase precipitates in the Nb-containing FeCrAl alloy effectively stabilized the deformed and recrystallized microstructures. The Mo-containing FeCrAl alloy exhibited strong γ texture fiber after annealing at 650–900 °C, whereas the annealed Nb-containing FeCrAl alloy had much weaker texture. Both strength and ductility decreased as the grain size increased in both alloys.",

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N2 - The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied. Fine and uniform recrystallized grain structures (~ 20–30 μm) were achieved in both alloys through suitable annealing after warm-rolling. The formation of Fe2Nb-type Laves phase precipitates in the Nb-containing FeCrAl alloy effectively stabilized the deformed and recrystallized microstructures. The Mo-containing FeCrAl alloy exhibited strong γ texture fiber after annealing at 650–900 °C, whereas the annealed Nb-containing FeCrAl alloy had much weaker texture. Both strength and ductility decreased as the grain size increased in both alloys.

AB - The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied. Fine and uniform recrystallized grain structures (~ 20–30 μm) were achieved in both alloys through suitable annealing after warm-rolling. The formation of Fe2Nb-type Laves phase precipitates in the Nb-containing FeCrAl alloy effectively stabilized the deformed and recrystallized microstructures. The Mo-containing FeCrAl alloy exhibited strong γ texture fiber after annealing at 650–900 °C, whereas the annealed Nb-containing FeCrAl alloy had much weaker texture. Both strength and ductility decreased as the grain size increased in both alloys.

KW - Annealing

KW - Electron backscattering diffraction (EBSD)

KW - FeCrAl alloys

KW - Hall-Petch effect

KW - Texture

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JO - Materials Characterization

JF - Materials Characterization

ER -

Microstructural control of FeCrAl alloys using Mo and Nb additions

Abstract

Bibliographical note

Funding

Keywords

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