A microscopic and crystallographic study of proton irradiated alloy 718

Chinthaka Silva; Miao Song; Mi Wang; Kiel Holliday; Keith Leonard; Gary Was; Jeremy Busby

doi:10.1016/j.jnucmat.2021.152954

A microscopic and crystallographic study of proton irradiated alloy 718

Chinthaka Silva, Miao Song, Mi Wang, Kiel Holliday, Keith Leonard, Gary Was, Jeremy Busby

Isotope Sci & Eng Directorate

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

5 Scopus citations

Abstract

Solution annealing and age hardening are important processes for achieving good engineering and chemical properties of alloy 718. The composition of alloy 718 also plays an important role as it can affect both mechanical (γ”- and γ’-phase formation) and irradiation behaviors. Therefore, five different sets of alloy 718 samples with two different chemical compositions were fabricated using different processing conditions and irradiated up to 4 dpa. Based on the effects of irradiation on the microstructural data of γ”- and γ’-phases, irradiation-induced dislocation statistics, and crystallographic data, it can be inferred that the samples processed at high solution annealing temperature (1093°C) behave better under irradiation compared to the samples processed at low solution annealing temperatures (945 and 1065°C).

Original language	English
Article number	152954
Journal	Journal of Nuclear Materials
Volume	551
DOIs	https://doi.org/10.1016/j.jnucmat.2021.152954
State	Published - Aug 1 2021

Bibliographical note

Publisher Copyright:
© 2021

Keywords

Alloy 718
austenitic gamma
dislocation loops
intermetallic phases
microstrain
radiation damage
stacking fault
thermal aging

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10.1016/j.jnucmat.2021.152954

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title = "A microscopic and crystallographic study of proton irradiated alloy 718",

abstract = "Solution annealing and age hardening are important processes for achieving good engineering and chemical properties of alloy 718. The composition of alloy 718 also plays an important role as it can affect both mechanical (γ”- and γ{\textquoteright}-phase formation) and irradiation behaviors. Therefore, five different sets of alloy 718 samples with two different chemical compositions were fabricated using different processing conditions and irradiated up to 4 dpa. Based on the effects of irradiation on the microstructural data of γ”- and γ{\textquoteright}-phases, irradiation-induced dislocation statistics, and crystallographic data, it can be inferred that the samples processed at high solution annealing temperature (1093°C) behave better under irradiation compared to the samples processed at low solution annealing temperatures (945 and 1065°C).",

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T1 - A microscopic and crystallographic study of proton irradiated alloy 718

AU - Silva, Chinthaka

AU - Song, Miao

AU - Wang, Mi

AU - Holliday, Kiel

AU - Leonard, Keith

AU - Was, Gary

AU - Busby, Jeremy

PY - 2021/8/1

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N2 - Solution annealing and age hardening are important processes for achieving good engineering and chemical properties of alloy 718. The composition of alloy 718 also plays an important role as it can affect both mechanical (γ”- and γ’-phase formation) and irradiation behaviors. Therefore, five different sets of alloy 718 samples with two different chemical compositions were fabricated using different processing conditions and irradiated up to 4 dpa. Based on the effects of irradiation on the microstructural data of γ”- and γ’-phases, irradiation-induced dislocation statistics, and crystallographic data, it can be inferred that the samples processed at high solution annealing temperature (1093°C) behave better under irradiation compared to the samples processed at low solution annealing temperatures (945 and 1065°C).

AB - Solution annealing and age hardening are important processes for achieving good engineering and chemical properties of alloy 718. The composition of alloy 718 also plays an important role as it can affect both mechanical (γ”- and γ’-phase formation) and irradiation behaviors. Therefore, five different sets of alloy 718 samples with two different chemical compositions were fabricated using different processing conditions and irradiated up to 4 dpa. Based on the effects of irradiation on the microstructural data of γ”- and γ’-phases, irradiation-induced dislocation statistics, and crystallographic data, it can be inferred that the samples processed at high solution annealing temperature (1093°C) behave better under irradiation compared to the samples processed at low solution annealing temperatures (945 and 1065°C).

KW - Alloy 718

KW - austenitic gamma

KW - dislocation loops

KW - intermetallic phases

KW - microstrain

KW - radiation damage

KW - stacking fault

KW - thermal aging

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A microscopic and crystallographic study of proton irradiated alloy 718

Abstract

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Keywords

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