Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Damping Behavior of Layered Aluminium and Aluminide Coatings on AISI 316 Austenitic Steel

Version 1 : Received: 27 July 2020 / Approved: 29 July 2020 / Online: 29 July 2020 (10:15:45 CEST)

A peer-reviewed article of this Preprint also exists.

Bonetti, E.; Campari, E.G.; Casagrande, A.; Catania, G.; Garzoni, A. Damping Behavior of Layered Aluminium and Aluminide Coatings on AISI 316 Austenitic Steel. Coatings 2020, 10, 888. Bonetti, E.; Campari, E.G.; Casagrande, A.; Catania, G.; Garzoni, A. Damping Behavior of Layered Aluminium and Aluminide Coatings on AISI 316 Austenitic Steel. Coatings 2020, 10, 888.

Abstract

Several coatings configurations of combined aluminizing and diffusion layered aluminide on 316 steel were produced and characterized. These coatings, typically employed as thermal barrier coating (TBC), can also be effective as vibration reduction elements at intermediate and high temperatures. This preliminary work has been focused on the microstructural design and processing effects of the coatings. The damping of the produced specimens was measured up to 450°C and compared with that of the steel substrate. The most performing coatings contain an Al-Si layer and exhibit a steep damping increase above 200 °C, reasonably due to dislocation movements by plastic straining of soft alloy layer and to the interface sliding between layers with different elastic moduli.

Keywords

aluminide; damping; coating; multilayer

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

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