期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 215, 期 -, 页码 114-122出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2014.07.017
关键词
Selective laser melting; Additive manufacturing; Porosity; Thin walls
资金
- LOEWE Research Center AdRIA (Adaptronic Research, Innovation, Application) [III L4-518/14.0004 (2008)]
- Hessen State Ministry of Higher Education, Research and the Arts
Selective laser melting (SLM) as additive manufacturing technology is studied in this paper for the generation of thin-walled elements with defined porosity characteristics. Building accuracy is studied and optimised regarding the manufacturing of thin walls. Leakage tests were performed to analyse the effect of 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 significant regression models were found for porosity and tensile strength which allow tailored properties within the studied design space. A maximum porosity of 17.35% with a permeability of 2560 E-12 m(2) was obtained. Macro pore sizes showed a unimodal pore size distribution with peaks between 7 and 16 mu m. (C) 2014 Elsevier B.V. All rights reserved.
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