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

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

2 Citations (Scopus)

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.

Original language	English
Pages (from-to)	928-935
Number of pages	8
Journal	Materials Research Letters
Volume	13
Issue number	9
DOIs	https://doi.org/10.1080/21663831.2025.2536044
Publication status	Published - 1 Jan 2025
Externally published	Yes

Keywords

Laser powder bed fusion
Solidification mode
crystallographic texture
stainless steel

Access to Document

10.1080/21663831.2025.2536044

Cite this

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

@article{697cc579803e4ff3b23d7db7124dfe11,

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.",

year = "2025",

month = jan,

day = "1",

doi = "10.1080/21663831.2025.2536044",

language = "English",

volume = "13",

pages = "928--935",

journal = "Materials Research Letters",

issn = "2166-3831",

publisher = "Taylor and Francis Ltd.",

number = "9",

}

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, no. 9, pp. 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

U2 - 10.1080/21663831.2025.2536044

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this