Microchemical evolution of irradiated additive-manufactured HT9

Pengyuan Xiu; Caleb P. Massey; T. M.Kelsy Green; Stephen Taller; Dieter Isheim; Niyanth Sridharan; Kevin G. Field

doi:10.1016/j.jnucmat.2021.153410

Microchemical evolution of irradiated additive-manufactured HT9

Pengyuan Xiu, Caleb P. Massey, T. M.Kelsy Green, Stephen Taller, Dieter Isheim, Niyanth Sridharan, Kevin G. Field

Advanced Fuel Fabrication and Instrument

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

4 Scopus citations

Abstract

The microstructural responses under 5 MeV Fe²⁺ single-ion-beam irradiation of three conditions of additive-manufactured (AM) HT9 steel using a powder-based directed energy deposition (DED) technique with and without postbuild heat treatments were investigated. Besides the observed dislocation loop formation and the absence of cavities at the irradiation condition of 50 dpa at 460 °C, Ni/Si/Mn-rich precipitates are found to form in all three conditions of AM-HT9, whereas Cu-rich clusters that arise from Cu uptake from the DED process are only observed in the heat-treated conditions, and not in the as-built (ASB) condition. Coprecipitation of the Cu- and Ni/Si/Mn-rich clusters occur near defect sinks such as line dislocations and grain boundaries in the heat-treated AM-HT9. The variation in microchemical evolution can be directly linked to the starting sink strength of the 3 AM-HT9 conditions, and the ASB condition with higher sink strength suppressed the responses observed in the postbuild heat-treated specimens.

Original language	English
Article number	153410
Journal	Journal of Nuclear Materials
Volume	559
DOIs	https://doi.org/10.1016/j.jnucmat.2021.153410
State	Published - Feb 2022

Funding

The irradiation in the Michigan Ion Beam Laboratory was supported by the U.S. 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. The authors gratefully acknowledge the MIBL staff and graduate students at University of Michigan for assistance with the ion irradiation. Characterization efforts at the University of Michigan and Oak Ridge National Laboratory (ORNL) was supported by the Advanced Fuels Campaign of the Fuel Cycle R&D program in the Office of Nuclear Energy, U.S. Department of Energy. This research was performed using the instrumentation (FEI Talos F200X S/TEM at ORNL) provided by the Department of Energy, Office of Nuclear Energy, Fuel Cycle R&D Program, and the Nuclear Science User Facilities. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI ( DMR-0420532 ) and ONR-DURIP ( N00014-0400798, N00014-0610539, N00014-0910781, N00014-1712870 ) programs. NUCAPT received support from the MRSEC program ( NSF DMR-1720139 ) at the Materials Research Center, the SHyNE Resource (NSF ECCS-1542205 ), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University. The irradiation in the Michigan Ion Beam Laboratory was supported by the U.S. 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. The authors gratefully acknowledge the MIBL staff and graduate students at University of Michigan for assistance with the ion irradiation. Characterization efforts at the University of Michigan and Oak Ridge National Laboratory (ORNL) was supported by the Advanced Fuels Campaign of the Fuel Cycle R&D program in the Office of Nuclear Energy, U.S. Department of Energy. This research was performed using the instrumentation (FEI Talos F200X S/TEM at ORNL) provided by the Department of Energy, Office of Nuclear Energy, Fuel Cycle R&D Program, and the Nuclear Science User Facilities. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781, N00014-1712870) programs. NUCAPT received support from the MRSEC program (NSF DMR-1720139) at the Materials Research Center, the SHyNE Resource (NSF ECCS-1542205), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University.

Funders	Funder number
Materials Research Center
NSF-MRI	DMR-0420532
ONR-DURIP	N00014-0610539, N00014-0910781, N00014-1712870, N00014-0400798
SHyNE Resource	ECCS-1542205
U.S. Department of Energy	DE-AC07- 051D14517
Office of Nuclear Energy
Oak Ridge National Laboratory
Northwestern University
University of Michigan
Materials Research Science and Engineering Center, Harvard University	NSF DMR-1720139

Keywords

Additive manufacturing
Clustering
Ferritic-martensitic HT9 steel
Irradiation
Precipitation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jnucmat.2021.153410

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title = "Microchemical evolution of irradiated additive-manufactured HT9",

abstract = "The microstructural responses under 5 MeV Fe2+ single-ion-beam irradiation of three conditions of additive-manufactured (AM) HT9 steel using a powder-based directed energy deposition (DED) technique with and without postbuild heat treatments were investigated. Besides the observed dislocation loop formation and the absence of cavities at the irradiation condition of 50 dpa at 460 °C, Ni/Si/Mn-rich precipitates are found to form in all three conditions of AM-HT9, whereas Cu-rich clusters that arise from Cu uptake from the DED process are only observed in the heat-treated conditions, and not in the as-built (ASB) condition. Coprecipitation of the Cu- and Ni/Si/Mn-rich clusters occur near defect sinks such as line dislocations and grain boundaries in the heat-treated AM-HT9. The variation in microchemical evolution can be directly linked to the starting sink strength of the 3 AM-HT9 conditions, and the ASB condition with higher sink strength suppressed the responses observed in the postbuild heat-treated specimens.",

keywords = "Additive manufacturing, Clustering, Ferritic-martensitic HT9 steel, Irradiation, Precipitation",

author = "Pengyuan Xiu and Massey, {Caleb P.} and Green, {T. M.Kelsy} and Stephen Taller and Dieter Isheim and Niyanth Sridharan and Field, {Kevin G.}",

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year = "2022",

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doi = "10.1016/j.jnucmat.2021.153410",

language = "English",

volume = "559",

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AU - Xiu, Pengyuan

AU - Massey, Caleb P.

AU - Green, T. M.Kelsy

AU - Taller, Stephen

AU - Isheim, Dieter

AU - Sridharan, Niyanth

AU - Field, Kevin G.

PY - 2022/2

Y1 - 2022/2

N2 - The microstructural responses under 5 MeV Fe2+ single-ion-beam irradiation of three conditions of additive-manufactured (AM) HT9 steel using a powder-based directed energy deposition (DED) technique with and without postbuild heat treatments were investigated. Besides the observed dislocation loop formation and the absence of cavities at the irradiation condition of 50 dpa at 460 °C, Ni/Si/Mn-rich precipitates are found to form in all three conditions of AM-HT9, whereas Cu-rich clusters that arise from Cu uptake from the DED process are only observed in the heat-treated conditions, and not in the as-built (ASB) condition. Coprecipitation of the Cu- and Ni/Si/Mn-rich clusters occur near defect sinks such as line dislocations and grain boundaries in the heat-treated AM-HT9. The variation in microchemical evolution can be directly linked to the starting sink strength of the 3 AM-HT9 conditions, and the ASB condition with higher sink strength suppressed the responses observed in the postbuild heat-treated specimens.

AB - The microstructural responses under 5 MeV Fe2+ single-ion-beam irradiation of three conditions of additive-manufactured (AM) HT9 steel using a powder-based directed energy deposition (DED) technique with and without postbuild heat treatments were investigated. Besides the observed dislocation loop formation and the absence of cavities at the irradiation condition of 50 dpa at 460 °C, Ni/Si/Mn-rich precipitates are found to form in all three conditions of AM-HT9, whereas Cu-rich clusters that arise from Cu uptake from the DED process are only observed in the heat-treated conditions, and not in the as-built (ASB) condition. Coprecipitation of the Cu- and Ni/Si/Mn-rich clusters occur near defect sinks such as line dislocations and grain boundaries in the heat-treated AM-HT9. The variation in microchemical evolution can be directly linked to the starting sink strength of the 3 AM-HT9 conditions, and the ASB condition with higher sink strength suppressed the responses observed in the postbuild heat-treated specimens.

KW - Additive manufacturing

KW - Clustering

KW - Ferritic-martensitic HT9 steel

KW - Irradiation

KW - Precipitation

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VL - 559

JO - Journal of Nuclear Materials

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ER -

Microchemical evolution of irradiated additive-manufactured HT9

Abstract

Funding

Keywords

UN SDGs

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