3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718

Andrew T. Polonsky; Narendran Raghavan; McLean L.P. Echlin; Michael M. Kirka; Ryan R. Dehoff; Tresa M. Pollock

doi:10.1007/978-3-030-51834-9_97

3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718

Andrew T. Polonsky, Narendran Raghavan, McLean L.P. Echlin, Michael M. Kirka, Ryan R. Dehoff, Tresa M. Pollock

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

20 Scopus citations

Abstract

Additive manufacturing (AM) provides enormous processing flexibility, enabling novel part geometries and optimized designs. Access to a local heat source further permits the potential for local microstructure control on the scale of individual melt pools, which can enable local control of part properties. In order to design tailored processing strategies for target microstructures, models predicting the columnar-to-equiaxed transition must be extended to the high solidification velocities and complex thermal histories present in AM. Here, we combine 3D characterization with advanced modeling techniques to develop a more complete understanding of the solidification process and evolution of microstructure during electron beam melting (EBM) of Inconel 718. Full calibration of existing microstructure prediction models demonstrates the differences between AM processes and more conventional welding techniques, underlying the need for accurate determination of key parameters that can only be measured directly in 3D. The ability to combine multisensor data in a consistent 3D framework via data fusion algorithms is essential to fully leverage these advanced characterization approaches. Thermal modeling provides insight on microstructure development within isolated solidification events and demonstrates the role of Marangoni effects on controlling solidification behavior.

Original language	English
Title of host publication	Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys
Editors	Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	990-1002
Number of pages	13
ISBN (Print)	9783030518332
DOIs	https://doi.org/10.1007/978-3-030-51834-9_97
State	Published - 2020
Event	14th International Symposium on Superalloys, Superalloys 2021 - Seven Springs, United States Duration: Sep 12 2021 → Sep 16 2021

Publication series

Name	Minerals, Metals and Materials Series
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	14th International Symposium on Superalloys, Superalloys 2021
Country/Territory	United States
City	Seven Springs
Period	09/12/21 → 09/16/21

Funding

Acknowledgements This research was sponsored by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC, and performed in partiality at the Oak Ridge National Laboratory’s Manufacturing Demonstration Facility, an Office of Energy Efficiency and Renewable Energy user facility. This research was also supported by the Department of Energy RAMP-UP program under award number 4000156470. Conflicts of Interest On behalf of all authors, the corresponding author states that there is no conflict of interest.

Keywords

Additive manufacturing
Microstructure
Solidification
Tomography

Access to Document

10.1007/978-3-030-51834-9_97

Cite this

Polonsky, A. T., Raghavan, N., Echlin, M. L. P., Kirka, M. M., Dehoff, R. R., & Pollock, T. M. (2020). 3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718. In S. Tin, M. Hardy, J. Clews, J. Cormier, Q. Feng, J. Marcin, C. O'Brien, & A. Suzuki (Eds.), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys (pp. 990-1002). (Minerals, Metals and Materials Series). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-030-51834-9_97

Polonsky, Andrew T. ; Raghavan, Narendran ; Echlin, McLean L.P. et al. / 3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718. Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. editor / Sammy Tin ; Mark Hardy ; Justin Clews ; Jonathan Cormier ; Qiang Feng ; John Marcin ; Chris O'Brien ; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. pp. 990-1002 (Minerals, Metals and Materials Series).

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title = "3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718",

abstract = "Additive manufacturing (AM) provides enormous processing flexibility, enabling novel part geometries and optimized designs. Access to a local heat source further permits the potential for local microstructure control on the scale of individual melt pools, which can enable local control of part properties. In order to design tailored processing strategies for target microstructures, models predicting the columnar-to-equiaxed transition must be extended to the high solidification velocities and complex thermal histories present in AM. Here, we combine 3D characterization with advanced modeling techniques to develop a more complete understanding of the solidification process and evolution of microstructure during electron beam melting (EBM) of Inconel 718. Full calibration of existing microstructure prediction models demonstrates the differences between AM processes and more conventional welding techniques, underlying the need for accurate determination of key parameters that can only be measured directly in 3D. The ability to combine multisensor data in a consistent 3D framework via data fusion algorithms is essential to fully leverage these advanced characterization approaches. Thermal modeling provides insight on microstructure development within isolated solidification events and demonstrates the role of Marangoni effects on controlling solidification behavior.",

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author = "Polonsky, {Andrew T.} and Narendran Raghavan and Echlin, {McLean L.P.} and Kirka, {Michael M.} and Dehoff, {Ryan R.} and Pollock, {Tresa M.}",

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year = "2020",

doi = "10.1007/978-3-030-51834-9_97",

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Polonsky, AT, Raghavan, N, Echlin, MLP, Kirka, MM , Dehoff, RR & Pollock, TM 2020, 3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718. in S Tin, M Hardy, J Clews, J Cormier, Q Feng, J Marcin, C O'Brien & A Suzuki (eds), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Minerals, Metals and Materials Series, Springer Science and Business Media Deutschland GmbH, pp. 990-1002, 14th International Symposium on Superalloys, Superalloys 2021, Seven Springs, United States, 09/12/21. https://doi.org/10.1007/978-3-030-51834-9_97

3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718. / Polonsky, Andrew T.; Raghavan, Narendran; Echlin, McLean L.P. et al.
Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. ed. / Sammy Tin; Mark Hardy; Justin Clews; Jonathan Cormier; Qiang Feng; John Marcin; Chris O'Brien; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. p. 990-1002 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Raghavan, Narendran

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AU - Kirka, Michael M.

AU - Dehoff, Ryan R.

AU - Pollock, Tresa M.

PY - 2020

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Polonsky AT, Raghavan N, Echlin MLP, Kirka MM , Dehoff RR, Pollock TM. 3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718. In Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A, editors, Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Springer Science and Business Media Deutschland GmbH. 2020. p. 990-1002. (Minerals, Metals and Materials Series). doi: 10.1007/978-3-030-51834-9_97

3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718

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Keywords

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