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Effect of thermal management approaches on geometry and productivity of thin-walled structures of er 5356 built by wire + arc additive manufacturing
Center for Research and Development of Welding Processes (Laprosolda), Department of Mechanical Engineering, Federal University of Uberlandia (UFU), Uberlândia (BRA).
Center for Research and Development of Welding Processes (Laprosolda), Department of Mechanical Engineering, Federal University of Uberlandia (UFU), Uberlândia (BRA).
Center for Research and Development of Welding Processes (Laprosolda), Department of Mechanical Engineering, Federal University of Uberlandia (UFU), Uberlândia (BRA).
Center for Research and Development of Welding Processes (Laprosolda), Department of Mechanical Engineering, Federal University of Uberlandia (UFU), Uberlândia (BRA).
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2021 (English)In: Coatings, ISSN 2079-6412, Vol. 11, no 9Article in journal (Refereed) Published
Abstract [en]

The present paper aimed at assessing the effect of two thermal management approaches on geometry and productivity of thin-walled structures built by Wire + Arc Additive Manufacturing (WAAM). Thin-walls of ER 5356 (Al5Mg) with different lengths and the same number of layers were deposited via the gas metal arc (GMA) process with the aid of an active cooling technique (near-immersion active cooling-NIAC) under a fixed set of deposition parameters. Then, the same experiment was performed with natural cooling (NC) in air. To characterize the thermal management approaches, the interpass temperature (i.e., the temperature at which subsequent layers are deposited) were monitored by a trailing/leading infrared pyrometer during the deposition time. Finally, thin walls with a fixed length were deposited using the NC and NIAC approaches with equivalent interpass temperatures. As expected, the shorter the wall length the more intense the deposition concentration, heat accumulation, and, thus, geometric deviation. This behavior was more evident and premature for the NC strategy due to its lower heat sinking effectiveness. The main finding was that, regardless of the thermal management technique applied, if the same interpass temperature is selected and maintained, the geometry of the part being built tends to be stable and very similar. However, the total deposition time is somewhat shorter with the NIAC technique due its greater heat sinking advantage. Thus, the NIAC technique facilitates the non-stop manufacturing of small parts and details via WAAM. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Place, publisher, year, edition, pages
MDPI , 2021. Vol. 11, no 9
Keywords [en]
directed energy deposition; wire + arc additive manufacturing; cold metal transfer; thin-walled structures; thermal management; part geometry; production time
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-17562DOI: 10.3390/coatings11091141ISI: 000699114800001Scopus ID: 2-s2.0-85115604285OAI: oai:DiVA.org:hv-17562DiVA, id: diva2:1609480
Note

This research was supported by the Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES), through Finance Code 001, and by the Brazilian National Council for Scientific and Technological Development (CNPq), through Grants 302863/2016-8 and 315092/2018-1.

Available from: 2021-11-08 Created: 2021-11-08 Last updated: 2022-01-19

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Scotti, Americo

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