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SURFACE ENGINEERING FOR PARTS MADE BY ADDITIVE MANUFACTURING
Nutal, Nicolas; Rochus, Pierre; Collette, Jean-Paul et al.
2015In 66th International Astronautical Congress
Peer reviewed
 

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Abstract :
[en] the surface preparation of metal parts made by additive manufacturing (AM). AM is a technology of choice for manufacturing of parts with complex shapes (heat exchangers, RF supports, optical parts…) and integrated functions such as conformal cooling channels, clips, hinges, etc. This opens the door for lightweight parts which are of prime importance for space applications. The potential of the AM technologies is however impeded by the quite rough surface finish that is observed on the as-manufactured parts. It is known that such a finish is likely to impact the performance of the parts. Several post-treatment techniques can be applied to improve the surface condition of the AM parts. However, so far, the influence of the successive post-processing steps on the final properties is not well established. Therefore, a better understanding of the impact of surface characteristics on the material behaviour is needed to expand the use of AM for high performance parts. The objective of this study, supported by ESA, is to propose and evaluate various surface finishing techniques for parts made by the AM technologies, in order to check their compatibility, evaluate their properties and derive guidelines for future applications. CRM is the prime proposer of this study and is in charge of the surface treatment and characterisations. Sirris additive manufacturing facilities are used to produce the parts. Thales Alenia Space and Walopt are included into the industrial team to provide concrete application cases. The study focuses on metals. Two metals under study are presented here: AlSi10Mg and Ti6Al4V. This paper is devoted to the early results of the first steps of surface preparation, namely material removal from the surface of the produced parts in order to improve their surface properties. As a first phase, tribo-finishing (TF) is tested on prototype parts to check its capabilities. Surface and volume parameters are analyzed, namely achieved roughness, material removal rate, location of removed material. The limitations in terms of geometry and applicability are discussed as well. These first observations should serve as guidelines for further application of AM for the design of parts used in space industry.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Nutal, Nicolas;  CRM Group, Belgium
Rochus, Pierre  ;  Université de Liège > CSL (Centre Spatial de Liège)
Collette, Jean-Paul
Crahay, Jean
Larnicol, Maiween
Jochem, Helen;  Thales Alenia Space France, France,
Magnien, Julien;  Sirris, Belgium,
Masse, Christian;  Thales Alenia Space France, France,
Rigo, Olivier;  Sirris, Belgium,
Vanhumbeeck, Jean-François;  CRM Group, Belgium,
Pambaguian, Laurent;  ESA, The Nederlands,
Language :
English
Title :
SURFACE ENGINEERING FOR PARTS MADE BY ADDITIVE MANUFACTURING
Publication date :
October 2015
Event name :
66th International Astronautical Congress, Jerusalem, Israel. Copyright ©2015 by the International Astronautical Federation.
Event organizer :
IAF
Event place :
Jerusalem, Israel
Event date :
du 9 au 19 octobre 2015
Audience :
International
Main work title :
66th International Astronautical Congress
Peer reviewed :
Peer reviewed
Available on ORBi :
since 04 January 2016

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