Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting

Evgenii Borisov; Kirill Starikov; Anatoly Popovich; Vera Popovich

doi:10.37904/metal.2020.3625

Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting

Evgenii Borisov^*, Kirill Starikov, Anatoly Popovich, Vera Popovich

^*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

78 Downloads (Pure)

Abstract

The aim of this study was to determine the influence of selective laser melting (SLM) process parameters on the formation of cracks in nickel-based single crystal alloy. Several sets of laser scanning parameters, with varied laser power, scanning speed and hatch distance, thus resulting in different volumetric and linear energy densities, were investigated. The relationship between energy density, specimen densification, cracks formation and evolution of directional microstructure was shown. It was found that higher linear energy density results in fewer cracking and defects. Cracking in lower energy samples was attributed to the formation of thermal shrinkage pores in the interdendritic spaces and precipitation of Ta, Mo and Nb carbides along the dendrites boundaries.

Original language	English
Title of host publication	Proceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 )
Publisher	TANGER Ltd.
Pages	875-879
ISBN (Electronic)	978-80-87294-97-0
DOIs	https://doi.org/10.37904/metal.2020.3625
Publication status	Published - 2020
Event	29th International Conference on Metallurgy and Materials, METAL 2020 - Brno, Czech Republic Duration: 20 May 2020 → 22 May 2020

Conference

Conference	29th International Conference on Metallurgy and Materials, METAL 2020
Country/Territory	Czech Republic
City	Brno
Period	20/05/20 → 22/05/20

Keywords

Additive manufacturing
Crack formation
Ni single crystal alloys
Selective laser melting

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10.37904/metal.2020.3625

metal2020_borisov_metalFinal published version, 808 KB

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@inproceedings{dc5b5a86d6de40faa6c99d2c85fdfd48,

title = "Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting",

abstract = "The aim of this study was to determine the influence of selective laser melting (SLM) process parameters on the formation of cracks in nickel-based single crystal alloy. Several sets of laser scanning parameters, with varied laser power, scanning speed and hatch distance, thus resulting in different volumetric and linear energy densities, were investigated. The relationship between energy density, specimen densification, cracks formation and evolution of directional microstructure was shown. It was found that higher linear energy density results in fewer cracking and defects. Cracking in lower energy samples was attributed to the formation of thermal shrinkage pores in the interdendritic spaces and precipitation of Ta, Mo and Nb carbides along the dendrites boundaries.",

keywords = "Additive manufacturing, Crack formation, Ni single crystal alloys, Selective laser melting",

author = "Evgenii Borisov and Kirill Starikov and Anatoly Popovich and Vera Popovich",

year = "2020",

doi = "10.37904/metal.2020.3625",

language = "English",

pages = "875--879",

booktitle = "Proceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 )",

publisher = "TANGER Ltd.",

note = "29th International Conference on Metallurgy and Materials, METAL 2020 ; Conference date: 20-05-2020 Through 22-05-2020",

}

Borisov, E, Starikov, K, Popovich, A & Popovich, V 2020, Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting. in Proceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 ) . TANGER Ltd., pp. 875-879, 29th International Conference on Metallurgy and Materials, METAL 2020, Brno, Czech Republic, 20/05/20. https://doi.org/10.37904/metal.2020.3625

Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting. / Borisov, Evgenii; Starikov, Kirill; Popovich, Anatoly et al.
Proceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 ) . TANGER Ltd., 2020. p. 875-879.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting

AU - Borisov, Evgenii

AU - Starikov, Kirill

AU - Popovich, Anatoly

AU - Popovich, Vera

PY - 2020

Y1 - 2020

N2 - The aim of this study was to determine the influence of selective laser melting (SLM) process parameters on the formation of cracks in nickel-based single crystal alloy. Several sets of laser scanning parameters, with varied laser power, scanning speed and hatch distance, thus resulting in different volumetric and linear energy densities, were investigated. The relationship between energy density, specimen densification, cracks formation and evolution of directional microstructure was shown. It was found that higher linear energy density results in fewer cracking and defects. Cracking in lower energy samples was attributed to the formation of thermal shrinkage pores in the interdendritic spaces and precipitation of Ta, Mo and Nb carbides along the dendrites boundaries.

AB - The aim of this study was to determine the influence of selective laser melting (SLM) process parameters on the formation of cracks in nickel-based single crystal alloy. Several sets of laser scanning parameters, with varied laser power, scanning speed and hatch distance, thus resulting in different volumetric and linear energy densities, were investigated. The relationship between energy density, specimen densification, cracks formation and evolution of directional microstructure was shown. It was found that higher linear energy density results in fewer cracking and defects. Cracking in lower energy samples was attributed to the formation of thermal shrinkage pores in the interdendritic spaces and precipitation of Ta, Mo and Nb carbides along the dendrites boundaries.

KW - Additive manufacturing

KW - Crack formation

KW - Ni single crystal alloys

KW - Selective laser melting

UR - http://www.scopus.com/inward/record.url?scp=85096754158&partnerID=8YFLogxK

U2 - 10.37904/metal.2020.3625

DO - 10.37904/metal.2020.3625

M3 - Conference contribution

AN - SCOPUS:85096754158

SP - 875

EP - 879

BT - Proceedings of the 29th International Conference on Metallurgy and Materials, Conference Proceedings (METAL 2020 )

PB - TANGER Ltd.

T2 - 29th International Conference on Metallurgy and Materials, METAL 2020

Y2 - 20 May 2020 through 22 May 2020

ER -

Cracks formation in nickel-based single crystal alloy manufactured by selective laser melting

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