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Schröttner, Hartmuth
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Publications (6/6 displayed)
- 2021Influence of high-pressure torsion deformation on the corrosion behaviour of a bioresorbable Mg-based alloy studied by positron annihilationcitations
- 2021High-Resolution Microstructure Characterization of Additively Manufactured X5CrNiCuNb17-4 Maraging Steel during Ex and In Situ Thermal Treatmentcitations
- 2020Microstructure Investigations of Powders and Additive Manufactured Partscitations
- 2019Carbohydrates@MOFscitations
- 2012Formation of liquid and solid products from liquid phase pyrolysiscitations
- 2012Investigation of friction stir welding of stainless steel using a stop-action-techniquecitations
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article
Microstructure Investigations of Powders and Additive Manufactured Parts
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.<br/><br/>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.<br/><br/>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.