Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF

C. Sofras; J. Čapek; G. Soundarapandiyan; A. Baganis; A. Özsoy; M. Šmíd; M. Jambor; N. Casati; C. Leinenbach; S. Van Petegem; M. Strobl; R. E. Logé; E. Polatidis

doi:10.1080/21663831.2025.2536044

Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF

C. Sofras
, J. Čapek
, G. Soundarapandiyan
, A. Baganis
, A. Özsoy
, M. Šmíd
, M. Jambor
, N. Casati
, C. Leinenbach
, S. Van Petegem
, M. Strobl
, R. E. Logé
, E. Polatidis

Paul Scherrer Institut
Laboratory of Thermomechanical Metallurgy (LMTM)
ENAC-IIC-GEL
Empa - Swiss Federal Laboratories for Materials Science and Technology
Structure and Mechanics of Advanced Materials
Paul Scherrer Institut
Czech Academy of Sciences
Materials Science Beamline
Laboratory of Technology and Strength of Materials
University of Patras

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

2 Citations (Scopus)

Résumé

This study examines the influence of small compositional variations on the microstructure of 304L stainless steel produced by Laser Powder Bed Fusion (L-PBF). Despite identical processing parameters, N-atomized powder forms textured, columnar grains with elemental segregation, solidifying primarily as γ-austenite with secondary ferrite. In contrast, Ar-atomized powder produces equiaxed grains with uniform composition, following a primary ferrite to secondary γ-austenite mode. Operando synchrotron X-ray diffraction during L-PBF reveals that solidification mode critically shapes the final microstructure, underscoring the importance of solidification control for tailoring properties in austenitic stainless steels.

langue originale	Anglais
Pages (de - à)	928-935
Nombre de pages	8
journal	Materials Research Letters
Volume	13
Numéro de publication	9
Les DOIs	https://doi.org/10.1080/21663831.2025.2536044
état	Publié - 1 janv. 2025
Modification externe	Oui

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10.1080/21663831.2025.2536044

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Sofras, C., Čapek, J., Soundarapandiyan, G., Baganis, A., Özsoy, A., Šmíd, M., Jambor, M., Casati, N., Leinenbach, C., Van Petegem, S., Strobl, M., Logé, R. E., & Polatidis, E. (2025). Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF. Materials Research Letters, 13(9), 928-935. https://doi.org/10.1080/21663831.2025.2536044

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title = "Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF",

abstract = "This study examines the influence of small compositional variations on the microstructure of 304L stainless steel produced by Laser Powder Bed Fusion (L-PBF). Despite identical processing parameters, N-atomized powder forms textured, columnar grains with elemental segregation, solidifying primarily as γ-austenite with secondary ferrite. In contrast, Ar-atomized powder produces equiaxed grains with uniform composition, following a primary ferrite to secondary γ-austenite mode. Operando synchrotron X-ray diffraction during L-PBF reveals that solidification mode critically shapes the final microstructure, underscoring the importance of solidification control for tailoring properties in austenitic stainless steels.",

keywords = "Laser powder bed fusion, Solidification mode, crystallographic texture, stainless steel",

author = "C. Sofras and J. {\v C}apek and G. Soundarapandiyan and A. Baganis and A. {\"O}zsoy and M. {\v S}m{\'i}d and M. Jambor and N. Casati and C. Leinenbach and \{Van Petegem\}, S. and M. Strobl and Log{\'e}, \{R. E.\} and E. Polatidis",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s). Published by Informa UK Limited, trading as Taylor \& Francis Group.",

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doi = "10.1080/21663831.2025.2536044",

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Sofras, C, Čapek, J, Soundarapandiyan, G, Baganis, A, Özsoy, A, Šmíd, M, Jambor, M, Casati, N, Leinenbach, C, Van Petegem, S, Strobl, M, Logé, RE & Polatidis, E 2025, 'Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF', Materials Research Letters, VOL. 13, Numéro 9, p. 928-935. https://doi.org/10.1080/21663831.2025.2536044

TY - JOUR

T1 - Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF

AU - Sofras, C.

AU - Čapek, J.

AU - Soundarapandiyan, G.

AU - Baganis, A.

AU - Özsoy, A.

AU - Šmíd, M.

AU - Jambor, M.

AU - Casati, N.

AU - Leinenbach, C.

AU - Van Petegem, S.

AU - Strobl, M.

AU - Logé, R. E.

AU - Polatidis, E.

PY - 2025/1/1

Y1 - 2025/1/1

N2 - This study examines the influence of small compositional variations on the microstructure of 304L stainless steel produced by Laser Powder Bed Fusion (L-PBF). Despite identical processing parameters, N-atomized powder forms textured, columnar grains with elemental segregation, solidifying primarily as γ-austenite with secondary ferrite. In contrast, Ar-atomized powder produces equiaxed grains with uniform composition, following a primary ferrite to secondary γ-austenite mode. Operando synchrotron X-ray diffraction during L-PBF reveals that solidification mode critically shapes the final microstructure, underscoring the importance of solidification control for tailoring properties in austenitic stainless steels.

AB - This study examines the influence of small compositional variations on the microstructure of 304L stainless steel produced by Laser Powder Bed Fusion (L-PBF). Despite identical processing parameters, N-atomized powder forms textured, columnar grains with elemental segregation, solidifying primarily as γ-austenite with secondary ferrite. In contrast, Ar-atomized powder produces equiaxed grains with uniform composition, following a primary ferrite to secondary γ-austenite mode. Operando synchrotron X-ray diffraction during L-PBF reveals that solidification mode critically shapes the final microstructure, underscoring the importance of solidification control for tailoring properties in austenitic stainless steels.

KW - Laser powder bed fusion

KW - Solidification mode

KW - crystallographic texture

KW - stainless steel

UR - https://www.scopus.com/pages/publications/105011978429

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DO - 10.1080/21663831.2025.2536044

M3 - Article

AN - SCOPUS:105011978429

SN - 2166-3831

VL - 13

SP - 928

EP - 935

JO - Materials Research Letters

JF - Materials Research Letters

IS - 9

ER -

Solidification pathway induced microstructural differences in austenitic stainless steels produced by L-PBF

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