Quasi In-Situ Study of Microstructure in a Laser Powder Bed Fusion Martensitic Stainless Steel

Ayda Shahriari; Mehdi Sanjari; Mahdi Mahmoudiniya; Hadi Pirgazi; Babak Shalchi Amirkhiz; Leo A.I. Kestens; Mohsen Mohammadi

doi:10.1007/s11661-024-07353-4

Quasi In-Situ Study of Microstructure in a Laser Powder Bed Fusion Martensitic Stainless Steel

Ayda Shahriari^*, Mehdi Sanjari, Mahdi Mahmoudiniya, Hadi Pirgazi, Babak Shalchi Amirkhiz, Leo A.I. Kestens, Mohsen Mohammadi

^*Corresponding author for this work

Team Maria Santofimia Navarro

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

Abstract

This study explores the evolution of solidification microstructure of a laser powder bed fusion (L-PBF) martensitic stainless steel during solution annealing and aging. Quasi in-situ experiments using electron backscatter diffraction (EBSD) revealed that the finer, more equiaxed microstructure below the melt pool was susceptible to recrystallization and grain growth during solution annealing. The two distinct solidification microstructures below and inside the melt pool converged into a uniform grain morphology after solution annealing and aging processes. Graphical Abstract: (Figure presented.)

Original language	English
Pages (from-to)	1302-1310
Number of pages	9
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	55
Issue number	5
DOIs	https://doi.org/10.1007/s11661-024-07353-4
Publication status	Published - 2024

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Funding

The authors acknowledge funding from the Natural Sciences and Engineering Research Council of Canada (Grant RGPIN-2016-04221), Atlantic Canada Opportunities Agency, Atlantic Innovation Fund (Project 210414), New Brunswick Innovation Foundation (Grant RIF2017-071), and Mitacs Accelerate Program (Grant IT10669).

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title = "Quasi In-Situ Study of Microstructure in a Laser Powder Bed Fusion Martensitic Stainless Steel",

abstract = "This study explores the evolution of solidification microstructure of a laser powder bed fusion (L-PBF) martensitic stainless steel during solution annealing and aging. Quasi in-situ experiments using electron backscatter diffraction (EBSD) revealed that the finer, more equiaxed microstructure below the melt pool was susceptible to recrystallization and grain growth during solution annealing. The two distinct solidification microstructures below and inside the melt pool converged into a uniform grain morphology after solution annealing and aging processes. Graphical Abstract: (Figure presented.)",

author = "Ayda Shahriari and Mehdi Sanjari and Mahdi Mahmoudiniya and Hadi Pirgazi and {Shalchi Amirkhiz}, Babak and Kestens, {Leo A.I.} and Mohsen Mohammadi",

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AU - Pirgazi, Hadi

AU - Shalchi Amirkhiz, Babak

AU - Kestens, Leo A.I.

AU - Mohammadi, Mohsen

N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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N2 - This study explores the evolution of solidification microstructure of a laser powder bed fusion (L-PBF) martensitic stainless steel during solution annealing and aging. Quasi in-situ experiments using electron backscatter diffraction (EBSD) revealed that the finer, more equiaxed microstructure below the melt pool was susceptible to recrystallization and grain growth during solution annealing. The two distinct solidification microstructures below and inside the melt pool converged into a uniform grain morphology after solution annealing and aging processes. Graphical Abstract: (Figure presented.)

AB - This study explores the evolution of solidification microstructure of a laser powder bed fusion (L-PBF) martensitic stainless steel during solution annealing and aging. Quasi in-situ experiments using electron backscatter diffraction (EBSD) revealed that the finer, more equiaxed microstructure below the melt pool was susceptible to recrystallization and grain growth during solution annealing. The two distinct solidification microstructures below and inside the melt pool converged into a uniform grain morphology after solution annealing and aging processes. Graphical Abstract: (Figure presented.)

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Quasi In-Situ Study of Microstructure in a Laser Powder Bed Fusion Martensitic Stainless Steel

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