Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism

Xiaobo Wang; Venkata Karthik Nadimpalli; Niels Skat Tiedje; Dorte Juul Jensen; Tianbo Yu

doi:10.1007/s11661-024-07644-w

Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism

Xiaobo Wang^*, Venkata Karthik Nadimpalli, Niels Skat Tiedje, Dorte Juul Jensen, Tianbo Yu^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

The 3D morphology of the additive-manufacturing-induced cell structure is characterized and its formation in austenitic stainless steel 316L fabricated by laser powder bed fusion is analyzed. The experimental results demonstrate that the cell structure has a 3D prism-like morphology with a crystallography-dependent spatial orientation. The formation of the cell structure is discussed. It is proposed that both the liquid–solid transformation and thermal strain contribute to the formation: the initial cells form during the liquid–solid transformation, and the final dislocation cell structure is shaped by thermal-stress-induced deformation during cooling and subsequent thermal cycles.

Original language	English
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	56
Pages (from-to)	506–517
ISSN	1543-1940
DOIs	https://doi.org/10.1007/s11661-024-07644-w
Publication status	Published - 2025

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title = "Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism",

abstract = "The 3D morphology of the additive-manufacturing-induced cell structure is characterized and its formation in austenitic stainless steel 316L fabricated by laser powder bed fusion is analyzed. The experimental results demonstrate that the cell structure has a 3D prism-like morphology with a crystallography-dependent spatial orientation. The formation of the cell structure is discussed. It is proposed that both the liquid–solid transformation and thermal strain contribute to the formation: the initial cells form during the liquid–solid transformation, and the final dislocation cell structure is shaped by thermal-stress-induced deformation during cooling and subsequent thermal cycles.",

author = "Xiaobo Wang and Nadimpalli, {Venkata Karthik} and Tiedje, {Niels Skat} and {Juul Jensen}, Dorte and Tianbo Yu",

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doi = "10.1007/s11661-024-07644-w",

language = "English",

volume = "56",

pages = "506–517",

journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

issn = "1543-1940",

publisher = "Minerals, Metals and Materials Society (TMS)",

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Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism. / Wang, Xiaobo ; Nadimpalli, Venkata Karthik ; Tiedje, Niels Skat et al.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 56, 2025, p. 506–517.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism

AU - Wang, Xiaobo

AU - Nadimpalli, Venkata Karthik

AU - Tiedje, Niels Skat

AU - Juul Jensen, Dorte

AU - Yu, Tianbo

PY - 2025

Y1 - 2025

N2 - The 3D morphology of the additive-manufacturing-induced cell structure is characterized and its formation in austenitic stainless steel 316L fabricated by laser powder bed fusion is analyzed. The experimental results demonstrate that the cell structure has a 3D prism-like morphology with a crystallography-dependent spatial orientation. The formation of the cell structure is discussed. It is proposed that both the liquid–solid transformation and thermal strain contribute to the formation: the initial cells form during the liquid–solid transformation, and the final dislocation cell structure is shaped by thermal-stress-induced deformation during cooling and subsequent thermal cycles.

AB - The 3D morphology of the additive-manufacturing-induced cell structure is characterized and its formation in austenitic stainless steel 316L fabricated by laser powder bed fusion is analyzed. The experimental results demonstrate that the cell structure has a 3D prism-like morphology with a crystallography-dependent spatial orientation. The formation of the cell structure is discussed. It is proposed that both the liquid–solid transformation and thermal strain contribute to the formation: the initial cells form during the liquid–solid transformation, and the final dislocation cell structure is shaped by thermal-stress-induced deformation during cooling and subsequent thermal cycles.

U2 - 10.1007/s11661-024-07644-w

DO - 10.1007/s11661-024-07644-w

M3 - Journal article

SN - 1543-1940

VL - 56

SP - 506

EP - 517

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

ER -

Additive-Manufacturing-Induced Cell Structure in Stainless Steel 316L: 3D Morphology and Formation Mechanism

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