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Analysis and optimisation of vertical surface roughness in micro selective laser melting

Abele, Eberhard and Kniepkamp, Michael (2015):
Analysis and optimisation of vertical surface roughness in micro selective laser melting.
In: Surface Topography: Metrology and Properties, IOP Publishing Ltd, p. 34007, 3, ISSN 2051-672X,
[Article]

Abstract

Surface roughness is a major disadvantage of many additive manufacturing technologies like selective laser melting (SLM) compared to established processes like milling or drilling. With recent advancements the resolution of the SLM process could be increased to layer heights of less than 10 μm leading to a new process called micro selective laser melting (μSLM). The purpose of this paper is to analyze the influence of the μSLM process parameters and exposure strategies on the morphology of vertical surfaces. Contour scanning using varying process parameters was used to increase the surface quality. It is shown that it is possible to achieve average surface roughness of less than 1.7 μmusing low scan speeds compared to 8–10 μmwithout contour scanning. Furthermore it is shown that a contour exposure prior to the core exposure leads to surface defects and thus increased roughness.

Item Type: Article
Erschienen: 2015
Creators: Abele, Eberhard and Kniepkamp, Michael
Title: Analysis and optimisation of vertical surface roughness in micro selective laser melting
Language: English
Abstract:

Surface roughness is a major disadvantage of many additive manufacturing technologies like selective laser melting (SLM) compared to established processes like milling or drilling. With recent advancements the resolution of the SLM process could be increased to layer heights of less than 10 μm leading to a new process called micro selective laser melting (μSLM). The purpose of this paper is to analyze the influence of the μSLM process parameters and exposure strategies on the morphology of vertical surfaces. Contour scanning using varying process parameters was used to increase the surface quality. It is shown that it is possible to achieve average surface roughness of less than 1.7 μmusing low scan speeds compared to 8–10 μmwithout contour scanning. Furthermore it is shown that a contour exposure prior to the core exposure leads to surface defects and thus increased roughness.

Journal or Publication Title: Surface Topography: Metrology and Properties, IOP Publishing Ltd
Volume: 3
Uncontrolled Keywords: additive manufacturing, selective laser melting, surface roughness
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute of Production Management, Technology and Machine Tools (PTW)
16 Department of Mechanical Engineering > Institute of Production Management, Technology and Machine Tools (PTW) > Additive Manufacturing and Dental Technology
Date Deposited: 22 Dec 2015 07:56
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