Irradiation-enhanced α′ precipitation in model FeCrAl alloys

P. D. Edmondson; S. A. Briggs; Y. Yamamoto; R. H. Howard; K. Sridharan; K. A. Terrani; K. G. Field

doi:10.1016/j.scriptamat.2016.02.002

Irradiation-enhanced α′ precipitation in model FeCrAl alloys

P. D. Edmondson, S. A. Briggs, Y. Yamamoto, R. H. Howard, K. Sridharan, K. A. Terrani, K. G. Field

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

150 Scopus citations

Abstract

Model FeCrAl alloys with varying compositions (Fe(10-18)Cr(10-6)Al at.%) have been neutron irradiated at ∼ 320 to damage levels of ∼ 7 displacements per atom (dpa) to investigate the compositional influence on the formation of irradiation-induced Cr-rich α′ precipitates using atom probe tomography. In all alloys, significant number densities of these precipitates were observed. Cluster compositions were investigated and it was found that the average cluster Cr content ranged between 51.1 and 62.5 at.% dependent on initial compositions. This is significantly lower than the Cr-content of α′ in binary FeCr alloys. Significant partitioning of the Al from the α′ precipitates was also observed.

Original language	English
Pages (from-to)	112-116
Number of pages	5
Journal	Scripta Materialia
Volume	116
DOIs	https://doi.org/10.1016/j.scriptamat.2016.02.002
State	Published - Apr 15 2016

Funding

Research was sponsored by the DOE's Office of Nuclear Energy, Advanced Fuel Campaign of the Fuel Cycle R&D Program . Neutron irradiation of FeCrAl alloys at ORNL's HFIR user facility was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, DOE . Atom probe tomography was conducted at the Center for Nanophase Materials Science, which is a DOE Office of Science User Facility; and the MaCS Laboratory at the Center for Advanced Energy Studies at Idaho National Laboratory. This work was supported by the US Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 as part of a Nuclear Science User Facilities experiment. Funding for SAB was provided by the DOE Office of Nuclear Energy's Nuclear Energy University Programs .

Funders	Funder number
DOE Office of Nuclear Energy
Nuclear Energy University Programs
Office of Basic Energy Sciences
Scientific User Facilities Division
US Department of Energy	DE-AC07-051D14517
U.S. Department of Energy
Office of Nuclear Energy

Keywords

APT
Alpha prime
FeCrAl
Neutron irradiation

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10.1016/j.scriptamat.2016.02.002

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title = "Irradiation-enhanced α′ precipitation in model FeCrAl alloys",

abstract = "Model FeCrAl alloys with varying compositions (Fe(10-18)Cr(10-6)Al at.%) have been neutron irradiated at ∼ 320 to damage levels of ∼ 7 displacements per atom (dpa) to investigate the compositional influence on the formation of irradiation-induced Cr-rich α′ precipitates using atom probe tomography. In all alloys, significant number densities of these precipitates were observed. Cluster compositions were investigated and it was found that the average cluster Cr content ranged between 51.1 and 62.5 at.% dependent on initial compositions. This is significantly lower than the Cr-content of α′ in binary FeCr alloys. Significant partitioning of the Al from the α′ precipitates was also observed.",

keywords = "APT, Alpha prime, FeCrAl, Neutron irradiation",

author = "Edmondson, {P. D.} and Briggs, {S. A.} and Y. Yamamoto and Howard, {R. H.} and K. Sridharan and Terrani, {K. A.} and Field, {K. G.}",

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TY - JOUR

T1 - Irradiation-enhanced α′ precipitation in model FeCrAl alloys

AU - Edmondson, P. D.

AU - Briggs, S. A.

AU - Yamamoto, Y.

AU - Howard, R. H.

AU - Sridharan, K.

AU - Terrani, K. A.

AU - Field, K. G.

PY - 2016/4/15

Y1 - 2016/4/15

N2 - Model FeCrAl alloys with varying compositions (Fe(10-18)Cr(10-6)Al at.%) have been neutron irradiated at ∼ 320 to damage levels of ∼ 7 displacements per atom (dpa) to investigate the compositional influence on the formation of irradiation-induced Cr-rich α′ precipitates using atom probe tomography. In all alloys, significant number densities of these precipitates were observed. Cluster compositions were investigated and it was found that the average cluster Cr content ranged between 51.1 and 62.5 at.% dependent on initial compositions. This is significantly lower than the Cr-content of α′ in binary FeCr alloys. Significant partitioning of the Al from the α′ precipitates was also observed.

AB - Model FeCrAl alloys with varying compositions (Fe(10-18)Cr(10-6)Al at.%) have been neutron irradiated at ∼ 320 to damage levels of ∼ 7 displacements per atom (dpa) to investigate the compositional influence on the formation of irradiation-induced Cr-rich α′ precipitates using atom probe tomography. In all alloys, significant number densities of these precipitates were observed. Cluster compositions were investigated and it was found that the average cluster Cr content ranged between 51.1 and 62.5 at.% dependent on initial compositions. This is significantly lower than the Cr-content of α′ in binary FeCr alloys. Significant partitioning of the Al from the α′ precipitates was also observed.

KW - APT

KW - Alpha prime

KW - FeCrAl

KW - Neutron irradiation

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DO - 10.1016/j.scriptamat.2016.02.002

M3 - Article

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SN - 1359-6462

VL - 116

SP - 112

EP - 116

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Irradiation-enhanced α′ precipitation in model FeCrAl alloys

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Keywords

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