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Towards High Build Rates: Combining Different Layer Thicknesses within One Part in Selective Laser Melting

Kniepkamp, Michael and Harbig, Jana and Seyfert, Christoph and Abele, Eberhard (2018):
Towards High Build Rates: Combining Different Layer Thicknesses within One Part in Selective Laser Melting.
In: Proceedings, 29th Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference, Austin, Texas (USA), [Conference or Workshop Item]

Abstract

Additive manufacturing of metallic parts using powder bed based fusion processes like selective laser melting is increasingly used in industrial applications. With typical layer thicknesses of 20 – 40 μm good surface qualities and high geometrical accuracy can be achieved compared to other AM processes. However, low layer thicknesses are to the detriment of build rates as more layers are required. Increasing the layer thickness can significantly increase build rates at the cost of surface quality and accuracy. In this paper a new parameter set for a layer thickness of 60 μm is developed and combinations of different layer thicknesses within one part are investigated. Thus increased build rates can be achieved while a high accuracy can be maintained when locally required. Specimens with combination of different layer thicknesses in various build orientations are produced and mechanically tested. Micrographs of the layer transitions are examined and recommendations for their design are given.

Item Type: Conference or Workshop Item
Erschienen: 2018
Creators: Kniepkamp, Michael and Harbig, Jana and Seyfert, Christoph and Abele, Eberhard
Title: Towards High Build Rates: Combining Different Layer Thicknesses within One Part in Selective Laser Melting
Language: English
Abstract:

Additive manufacturing of metallic parts using powder bed based fusion processes like selective laser melting is increasingly used in industrial applications. With typical layer thicknesses of 20 – 40 μm good surface qualities and high geometrical accuracy can be achieved compared to other AM processes. However, low layer thicknesses are to the detriment of build rates as more layers are required. Increasing the layer thickness can significantly increase build rates at the cost of surface quality and accuracy. In this paper a new parameter set for a layer thickness of 60 μm is developed and combinations of different layer thicknesses within one part are investigated. Thus increased build rates can be achieved while a high accuracy can be maintained when locally required. Specimens with combination of different layer thicknesses in various build orientations are produced and mechanically tested. Micrographs of the layer transitions are examined and recommendations for their design are given.

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
Event Title: Proceedings, 29th Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference, Austin, Texas (USA)
Date Deposited: 12 Mar 2019 14:21
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