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The influence of AlSi10Mg recycled powder on corrosion-resistance behaviour of additively manufactured components: mechanical aspects and acoustic emission investigation

Barile Claudia, Casavola Caterina, Kannan Vimalathithan Paramsamy, Renna Gilda

Archives of Civil and Mechanical Engineering

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2022

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Vol. 22, no. 1

art. no. e52, 2022

EN

The effects of using recycled AlSi10Mg aluminium alloy powders on the mechanical properties and the corrosion-resistance behaviour of the components manufactured via selective laser melting (SLM) were analysed. The microstructural results show that the utilisation of recycled powder causes coarsening of interdendritic Si-network, especially along the melt pool boundaries of the SLM specimens. The corrosion resistance of the samples was evaluated by means of neutral salt spray (NSS) tests for 1000 h and mass loss measurements. The corrosion behaviour, in terms of surface roughness, density and porosity, however, remains almost the same between the samples produced by virgin and recycled powder. In addition to this, a passive NDE tool has been used to investigate and study the impact of powders on the corrosion performance of the alloy: Acoustic Emission (AE) technique. SEM observations allowed to highlight the morphological differences in the surface of the test specimens induced by the exposure condition. Thus, it was possible to correlate the AE results to corrosion mechanisms activated on the surfaces of the test specimen. A good correlation between the corrosion-resistance behaviour and the AE test results were obtained. Finally, the mechanical properties before and at the end of the accelerated corrosion were evaluated according to the yield strength, tensile strength, and elongation at breakage. The results showed comparable mechanical properties for the samples produced using both virgin and recycled powders. Besides, no notable influence of the exposure to corrosive environment on the mechanical performance was observed.

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Is It Time for the Maritime Industry to Embrace 3d Printed Spare Parts?

Kostidi E., Nikitakos N.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2018

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Vol. 12, no. 3

557--564

EN

New technology comes with benefits for companies that choose to adopt. Additive manufacturing (AM) or 3d printing as it is commonly known has been already implemented in various sectors (industrial and consumer products, medical, automotive, aerospace, etc.). The shipping industry is characterized as conservative to changes. As AM is starting to consolidate in the industry, can offer lessons guiding changes. Application in industries with similar to shipping characteristics (industries with moving assets), reveals the potential of applying it in the shipping industry. The availability of spare parts is important for the vessel maintenance. Additive manufacturing could shorten the space parts supply chain in the maritime industry, since the part could be made near the place it is needed.

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Koncepcja systemu podparcia wózka dla osób z niepełnosprawnością ruchową – prezentacja rozwiązania z zastosowaniem druku 3D

Fudali P., Miechowicz S., Kudasik T.

Mechanik

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2017

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R. 90, nr 5-6

450--452

PL

Omówiono nowatorską koncepcję siedziska wózka dla osób z niepełnosprawnościami. Rozwiązanie przedstawiono w postaci modelu CAD i modelu rzeczywistego. Dodatkowo pokazano możliwości konsolidacji elektronicznych układów wykonawczych w celu wizualizacji koncepcji i zasady działania.

EN

An innovative concept of the seat design in the wheelchair for persons with disabilities is discussed. The solution is presented as a CAD model as well as in the form of a real model. Additionally, prospects of consolidation of electronic actuators are shown providing for visualization of concepts and principles of operation.