Hydrogen effects in equiatomic CrFeNiMn alloy fabricated by laser powder bed fusion

Xuan Yang; Yuriy Yagodzinskyy; Yanling Ge; Eryang Lu; Joonas Lehtonen; Lauri Kollo; Simo-Pekka Hannula

doi:10.3390/met11060872

Hydrogen effects in equiatomic CrFeNiMn alloy fabricated by laser powder bed fusion

Xuan Yang^*, Yuriy Yagodzinskyy, Yanling Ge, Eryang Lu, Joonas Lehtonen, Lauri Kollo, Simo-Pekka Hannula

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

10 Sitaatiot (Scopus)

101 Lataukset (Pure)

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This study investigates the effects of laser powder bed fusion (LPBF) on the hydrogen uptake of the face-centered cubic (FCC) equiatomic CrFeNiMn multicomponent alloy after cathodic hydrogen charging (HC). Hydrogen desorption was evaluated using thermal desorption spectroscopy (TDS), and microstructural changes after the TDS test were examined. Results reveal that the amount of hydrogen absorbed by LPBF CrFeNiMn alloy was significantly higher than that in pulsed electric current sintered (PECS) CrFeNiMn alloy or in conventional 316L austenitic stainless steel. The observations are ascribed to the differences in the amount of hydrogen absorbed by the multicomponent lattice, dislocation densities, width of segregation range at cell walls created by the rapid cooling in LBPF, and vacancies remaining after cooling to room temperature. A hydrogen-charged LBPF transmission electron microscope (TEM) specimen was also characterized. Stacking faults and cracks along the (111)-planes of austenite were observed. Scanning electron microscopy (SEM) of the surface of the TDS-tested samples also indicated hydrogen-induced cracks and hydrogen-induced submicron pits at the grain boundary inclusions.

Alkuperäiskieli	Englanti
Artikkeli	872
Sivumäärä	14
Julkaisu	Metals
Vuosikerta	11
Numero	6
DOI - pysyväislinkit	https://doi.org/10.3390/met11060872
Tila	Julkaistu - kesäk. 2021
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.3390/met11060872

metals-11-00872Final published version, 4,77 MBLisenssi: CC BY

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@article{16e60c49329d4bdbac1bf8ec5fdf1344,

title = "Hydrogen effects in equiatomic CrFeNiMn alloy fabricated by laser powder bed fusion",

abstract = "This study investigates the effects of laser powder bed fusion (LPBF) on the hydrogen uptake of the face-centered cubic (FCC) equiatomic CrFeNiMn multicomponent alloy after cathodic hydrogen charging (HC). Hydrogen desorption was evaluated using thermal desorption spectroscopy (TDS), and microstructural changes after the TDS test were examined. Results reveal that the amount of hydrogen absorbed by LPBF CrFeNiMn alloy was significantly higher than that in pulsed electric current sintered (PECS) CrFeNiMn alloy or in conventional 316L austenitic stainless steel. The observations are ascribed to the differences in the amount of hydrogen absorbed by the multicomponent lattice, dislocation densities, width of segregation range at cell walls created by the rapid cooling in LBPF, and vacancies remaining after cooling to room temperature. A hydrogen-charged LBPF transmission electron microscope (TEM) specimen was also characterized. Stacking faults and cracks along the (111)-planes of austenite were observed. Scanning electron microscopy (SEM) of the surface of the TDS-tested samples also indicated hydrogen-induced cracks and hydrogen-induced submicron pits at the grain boundary inclusions.",

keywords = "High-entropy alloys, Hydrogen charging, Laser powder bed fusion, Selective laser melting, Thermal desorption spectroscopy",

author = "Xuan Yang and Yuriy Yagodzinskyy and Yanling Ge and Eryang Lu and Joonas Lehtonen and Lauri Kollo and Simo-Pekka Hannula",

note = "Funding Information: Funding: This research was funded by the Foundation for Aalto University Science and Technology and the China Scholarship Council fellowship (grant number 201706040062). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = jun,

doi = "10.3390/met11060872",

language = "English",

volume = "11",

journal = "Metals",

issn = "2075-4701",

publisher = "MDPI AG",

number = "6",

}

TY - JOUR

T1 - Hydrogen effects in equiatomic CrFeNiMn alloy fabricated by laser powder bed fusion

AU - Yang, Xuan

AU - Yagodzinskyy, Yuriy

AU - Ge, Yanling

AU - Lu, Eryang

AU - Lehtonen, Joonas

AU - Kollo, Lauri

AU - Hannula, Simo-Pekka

N1 - Funding Information: Funding: This research was funded by the Foundation for Aalto University Science and Technology and the China Scholarship Council fellowship (grant number 201706040062). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/6

Y1 - 2021/6

N2 - This study investigates the effects of laser powder bed fusion (LPBF) on the hydrogen uptake of the face-centered cubic (FCC) equiatomic CrFeNiMn multicomponent alloy after cathodic hydrogen charging (HC). Hydrogen desorption was evaluated using thermal desorption spectroscopy (TDS), and microstructural changes after the TDS test were examined. Results reveal that the amount of hydrogen absorbed by LPBF CrFeNiMn alloy was significantly higher than that in pulsed electric current sintered (PECS) CrFeNiMn alloy or in conventional 316L austenitic stainless steel. The observations are ascribed to the differences in the amount of hydrogen absorbed by the multicomponent lattice, dislocation densities, width of segregation range at cell walls created by the rapid cooling in LBPF, and vacancies remaining after cooling to room temperature. A hydrogen-charged LBPF transmission electron microscope (TEM) specimen was also characterized. Stacking faults and cracks along the (111)-planes of austenite were observed. Scanning electron microscopy (SEM) of the surface of the TDS-tested samples also indicated hydrogen-induced cracks and hydrogen-induced submicron pits at the grain boundary inclusions.

AB - This study investigates the effects of laser powder bed fusion (LPBF) on the hydrogen uptake of the face-centered cubic (FCC) equiatomic CrFeNiMn multicomponent alloy after cathodic hydrogen charging (HC). Hydrogen desorption was evaluated using thermal desorption spectroscopy (TDS), and microstructural changes after the TDS test were examined. Results reveal that the amount of hydrogen absorbed by LPBF CrFeNiMn alloy was significantly higher than that in pulsed electric current sintered (PECS) CrFeNiMn alloy or in conventional 316L austenitic stainless steel. The observations are ascribed to the differences in the amount of hydrogen absorbed by the multicomponent lattice, dislocation densities, width of segregation range at cell walls created by the rapid cooling in LBPF, and vacancies remaining after cooling to room temperature. A hydrogen-charged LBPF transmission electron microscope (TEM) specimen was also characterized. Stacking faults and cracks along the (111)-planes of austenite were observed. Scanning electron microscopy (SEM) of the surface of the TDS-tested samples also indicated hydrogen-induced cracks and hydrogen-induced submicron pits at the grain boundary inclusions.

KW - High-entropy alloys

KW - Hydrogen charging

KW - Laser powder bed fusion

KW - Selective laser melting

KW - Thermal desorption spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85106596925&partnerID=8YFLogxK

U2 - 10.3390/met11060872

DO - 10.3390/met11060872

M3 - Article

AN - SCOPUS:85106596925

SN - 2075-4701

VL - 11

JO - Metals

JF - Metals

IS - 6

M1 - 872

ER -

Hydrogen effects in equiatomic CrFeNiMn alloy fabricated by laser powder bed fusion

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