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Selective laser melting for manufacturing of thin-walled porous elements

Abele, Eberhard and Stoffregen, Hanns A. and Kniepkamp, Michael and Lang, Sebastian and Hampe, Manfred (2015):
Selective laser melting for manufacturing of thin-walled porous elements.
In: Journal of Materials Processing Technology, pp. 114-122, 215, ISSN 0924-0136,
[Online-Edition: http://dx.doi.org/10.1016/j.jmatprotec.2014.07.017],
[Article]

Abstract

Selective laser melting (SLM) as additive manufacturing technology is studied in this paper for the gen-eration of thin-walled elements with defined porosity characteristics. Building accuracy is studied andoptimised regarding the manufacturing of thin walls. Leakage tests were performed to analyse the effectof wall thickness on gastightness. The influences of the SLM process parameters laser power, scan speed,and hatch distance on porosity and mechanical characteristics are investigated using a DoE approach.Porosity, permeability, pore size distribution, and tensile strength were analysed. Statistical significantregression models were found for porosity and tensile strength which allow tailored properties within thestudied design space. A maximum porosity of 17.35 with a permeability of 2560 E-12 m2was obtained.Macro pore sizes showed a unimodal pore size distribution with peaks between 7 and 16

Item Type: Article
Erschienen: 2015
Creators: Abele, Eberhard and Stoffregen, Hanns A. and Kniepkamp, Michael and Lang, Sebastian and Hampe, Manfred
Title: Selective laser melting for manufacturing of thin-walled porous elements
Language: English
Abstract:

Selective laser melting (SLM) as additive manufacturing technology is studied in this paper for the gen-eration of thin-walled elements with defined porosity characteristics. Building accuracy is studied andoptimised regarding the manufacturing of thin walls. Leakage tests were performed to analyse the effectof wall thickness on gastightness. The influences of the SLM process parameters laser power, scan speed,and hatch distance on porosity and mechanical characteristics are investigated using a DoE approach.Porosity, permeability, pore size distribution, and tensile strength were analysed. Statistical significantregression models were found for porosity and tensile strength which allow tailored properties within thestudied design space. A maximum porosity of 17.35 with a permeability of 2560 E-12 m2was obtained.Macro pore sizes showed a unimodal pore size distribution with peaks between 7 and 16

Journal or Publication Title: Journal of Materials Processing Technology
Volume: 215
Uncontrolled Keywords: Selective laser melting, Additive manufacturing, Porosity, Thin walls
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
16 Department of Mechanical Engineering > Chair of Thermal Process Engineering (TVT)
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Date Deposited: 10 Sep 2014 08:12
Official URL: http://dx.doi.org/10.1016/j.jmatprotec.2014.07.017
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