Sensitization, desensitization, and carbide evolution of Alloy 800H made by laser powder bed fusion

Jingfan Yang; Xiang Liu; Miao Song; Lingfeng He; Stephen Bankson; Michael Hamilton; Bart Prorok; Xiaoyuan Lou

doi:10.1016/j.addma.2021.102547

Sensitization, desensitization, and carbide evolution of Alloy 800H made by laser powder bed fusion

Jingfan Yang
, Xiang Liu
, Miao Song
, Lingfeng He
, Stephen Bankson
, Michael Hamilton
, Bart Prorok
, Xiaoyuan Lou

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

16 Scopus citations

Abstract

Additively manufactured (AM) Alloy 800H made by laser powder bed fusion (L-PBF) exhibited a greater degree of sensitization than wrought 800H, leading to both intergranular and intercellular corrosion. Dislocation cellular boundaries showed mild Cr depletion as compared to high-angle grain boundaries (HAGBs). Boundary misorientation of < 5⁰ was found mitigating sensitization. Carbide growth in AM 800H was controlled by particle net growth at the early stage and Ostwald ripening at the later stage. Cellular structure was confirmed producing faster elemental diffusion than bulk diffusion and random dislocation structures by cold rolling, and leading more rapid carbide growth, chromium depletion, and desensitization on HAGBs. Sensitization along cellular boundaries is not the main cause of intercellular corrosion in the sensitized AM Alloy 800H.

Original language	English
Article number	102547
Journal	Additive Manufacturing
Volume	50
Early online date	Dec 3 2021
DOIs	https://doi.org/10.1016/j.addma.2021.102547
State	Published - Feb 2022

Keywords

Alloy 800H
Carbide formation
Dislocation cellular structures
Laser powder bed fusion additive manufacturing
Sensitization

INL Publication Number

INL/JOU-20-60631
54744

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10.1016/j.addma.2021.102547

Cite this

@article{b9d8de985c4e4406a63d671b8604a815,

title = "Sensitization, desensitization, and carbide evolution of Alloy 800H made by laser powder bed fusion",

abstract = "Additively manufactured (AM) Alloy 800H made by laser powder bed fusion (L-PBF) exhibited a greater degree of sensitization than wrought 800H, leading to both intergranular and intercellular corrosion. Dislocation cellular boundaries showed mild Cr depletion as compared to high-angle grain boundaries (HAGBs). Boundary misorientation of < 5⁰ was found mitigating sensitization. Carbide growth in AM 800H was controlled by particle net growth at the early stage and Ostwald ripening at the later stage. Cellular structure was confirmed producing faster elemental diffusion than bulk diffusion and random dislocation structures by cold rolling, and leading more rapid carbide growth, chromium depletion, and desensitization on HAGBs. Sensitization along cellular boundaries is not the main cause of intercellular corrosion in the sensitized AM Alloy 800H.",

keywords = "Alloy 800H, Carbide formation, Dislocation cellular structures, Laser powder bed fusion additive manufacturing, Sensitization",

author = "Jingfan Yang and Xiang Liu and Miao Song and Lingfeng He and Stephen Bankson and Michael Hamilton and Bart Prorok and Xiaoyuan Lou",

note = "Funding Information: This research is primarily supported by the Idaho National Lab Laboratory Directed Research \& Development (LDRD) Program under the US Department of Energy Idaho Operations Office contract DE-AC07-05ID14517 . The work was also partially supported by the National Institute of Standards and Technology (US) under contract NIST-70NANB18H220 . Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = feb,

doi = "10.1016/j.addma.2021.102547",

language = "English",

volume = "50",

journal = "Additive Manufacturing",

issn = "2214-8604",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Sensitization, desensitization, and carbide evolution of Alloy 800H made by laser powder bed fusion

AU - Yang, Jingfan

AU - Liu, Xiang

AU - Song, Miao

AU - He, Lingfeng

AU - Bankson, Stephen

AU - Hamilton, Michael

AU - Prorok, Bart

AU - Lou, Xiaoyuan

N1 - Funding Information: This research is primarily supported by the Idaho National Lab Laboratory Directed Research & Development (LDRD) Program under the US Department of Energy Idaho Operations Office contract DE-AC07-05ID14517 . The work was also partially supported by the National Institute of Standards and Technology (US) under contract NIST-70NANB18H220 . Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/2

Y1 - 2022/2

N2 - Additively manufactured (AM) Alloy 800H made by laser powder bed fusion (L-PBF) exhibited a greater degree of sensitization than wrought 800H, leading to both intergranular and intercellular corrosion. Dislocation cellular boundaries showed mild Cr depletion as compared to high-angle grain boundaries (HAGBs). Boundary misorientation of < 5⁰ was found mitigating sensitization. Carbide growth in AM 800H was controlled by particle net growth at the early stage and Ostwald ripening at the later stage. Cellular structure was confirmed producing faster elemental diffusion than bulk diffusion and random dislocation structures by cold rolling, and leading more rapid carbide growth, chromium depletion, and desensitization on HAGBs. Sensitization along cellular boundaries is not the main cause of intercellular corrosion in the sensitized AM Alloy 800H.

AB - Additively manufactured (AM) Alloy 800H made by laser powder bed fusion (L-PBF) exhibited a greater degree of sensitization than wrought 800H, leading to both intergranular and intercellular corrosion. Dislocation cellular boundaries showed mild Cr depletion as compared to high-angle grain boundaries (HAGBs). Boundary misorientation of < 5⁰ was found mitigating sensitization. Carbide growth in AM 800H was controlled by particle net growth at the early stage and Ostwald ripening at the later stage. Cellular structure was confirmed producing faster elemental diffusion than bulk diffusion and random dislocation structures by cold rolling, and leading more rapid carbide growth, chromium depletion, and desensitization on HAGBs. Sensitization along cellular boundaries is not the main cause of intercellular corrosion in the sensitized AM Alloy 800H.

KW - Alloy 800H

KW - Carbide formation

KW - Dislocation cellular structures

KW - Laser powder bed fusion additive manufacturing

KW - Sensitization

UR - https://www.scopus.com/pages/publications/85121228528

UR - https://www.mendeley.com/catalogue/d880d975-6c62-3ac0-9a02-3a7dae59a52b/

U2 - 10.1016/j.addma.2021.102547

DO - 10.1016/j.addma.2021.102547

M3 - Article

AN - SCOPUS:85121228528

SN - 2214-8604

VL - 50

JO - Additive Manufacturing

JF - Additive Manufacturing

M1 - 102547

ER -

Sensitization, desensitization, and carbide evolution of Alloy 800H made by laser powder bed fusion

Abstract

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