Microstructure Investigations of Powders and Additive Manufactured Parts

Mihaela Albu; Stefan Mitsche; Manfred Nachtnebel; Robert Krisper; Martina Dienstleder; Hartmuth Schröttner; Gerald Kothleitner

doi:10.1007/s00501-020-00958-3

Microstructure Investigations of Powders and Additive Manufactured Parts

Mihaela Albu, Stefan Mitsche, Manfred Nachtnebel, Robert Krisper, Martina Dienstleder, Hartmuth Schröttner, Gerald Kothleitner

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

Abstract

This paper presents an advanced microstructural analysis of the AlSiMg, Ti64, and N700 powders used for additive manufacturing. The internal microstructure of the regular and irregular powder grains were characterized down to atomic resolution by using scanning electron microscopy and high resolution scanning transmission electron microscopy.

The accretionary forms on top of the irregular AlSiMg powder grains exhibit a slightly coarse microstructure with a network of eutectic Si consisting of nano-crystallites, suggesting a slower cooling than the grain itself that contain a predominately amorphous Si network.

A nm thin amorphous C layer on the surface of some Ti64 plasma atomized powder grains promoted the attachment of satellites and growth of envelopes. In case of gas atomized N700 powder grains, we identified thin oxide and carbon amorphous layers as well as metal segregations at the interface between the grain body and the accretionary forms.

Translated title of the contribution	Mikrostrukturuntersuchungen von Pulvern und additiv hergestellten Bauteilen
Original language	English
Pages (from-to)	169-174
Number of pages	6
Journal	Berg- und hüttenmännische Monatshefte
Volume	165
Issue number	3
DOIs	https://doi.org/10.1007/s00501-020-00958-3
Publication status	Published - 25 Feb 2020

ASJC Scopus subject areas

Materials Science(all)

Fields of Expertise

Advanced Materials Science

Treatment code (Nähere Zuordnung)

Experimental

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https://doi.org/10.1007/s00501-020-00958-3Licence: CC BY 4.0

Cite this

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abstract = "This paper presents an advanced microstructural analysis of the AlSiMg, Ti64, and N700 powders used for additive manufacturing. The internal microstructure of the regular and irregular powder grains were characterized down to atomic resolution by using scanning electron microscopy and high resolution scanning transmission electron microscopy.The accretionary forms on top of the irregular AlSiMg powder grains exhibit a slightly coarse microstructure with a network of eutectic Si consisting of nano-crystallites, suggesting a slower cooling than the grain itself that contain a predominately amorphous Si network.A nm thin amorphous C layer on the surface of some Ti64 plasma atomized powder grains promoted the attachment of satellites and growth of envelopes. In case of gas atomized N700 powder grains, we identified thin oxide and carbon amorphous layers as well as metal segregations at the interface between the grain body and the accretionary forms.",

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AU - Albu, Mihaela

AU - Mitsche, Stefan

AU - Nachtnebel, Manfred

AU - Krisper, Robert

AU - Dienstleder, Martina

AU - Schröttner, Hartmuth

AU - Kothleitner, Gerald

PY - 2020/2/25

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N2 - This paper presents an advanced microstructural analysis of the AlSiMg, Ti64, and N700 powders used for additive manufacturing. The internal microstructure of the regular and irregular powder grains were characterized down to atomic resolution by using scanning electron microscopy and high resolution scanning transmission electron microscopy.The accretionary forms on top of the irregular AlSiMg powder grains exhibit a slightly coarse microstructure with a network of eutectic Si consisting of nano-crystallites, suggesting a slower cooling than the grain itself that contain a predominately amorphous Si network.A nm thin amorphous C layer on the surface of some Ti64 plasma atomized powder grains promoted the attachment of satellites and growth of envelopes. In case of gas atomized N700 powder grains, we identified thin oxide and carbon amorphous layers as well as metal segregations at the interface between the grain body and the accretionary forms.

AB - This paper presents an advanced microstructural analysis of the AlSiMg, Ti64, and N700 powders used for additive manufacturing. The internal microstructure of the regular and irregular powder grains were characterized down to atomic resolution by using scanning electron microscopy and high resolution scanning transmission electron microscopy.The accretionary forms on top of the irregular AlSiMg powder grains exhibit a slightly coarse microstructure with a network of eutectic Si consisting of nano-crystallites, suggesting a slower cooling than the grain itself that contain a predominately amorphous Si network.A nm thin amorphous C layer on the surface of some Ti64 plasma atomized powder grains promoted the attachment of satellites and growth of envelopes. In case of gas atomized N700 powder grains, we identified thin oxide and carbon amorphous layers as well as metal segregations at the interface between the grain body and the accretionary forms.

KW - microstructur of 3D printed parts

U2 - 10.1007/s00501-020-00958-3

DO - 10.1007/s00501-020-00958-3

M3 - Article

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JO - Berg- und hüttenmännische Monatshefte

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ER -

Microstructure Investigations of Powders and Additive Manufactured Parts

Abstract

ASJC Scopus subject areas

Fields of Expertise

Treatment code (Nähere Zuordnung)

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