Microstructure and Wear Resistance of Fe3Al Coating on GCI Prepared by Direct Energy Deposition (DED)

Hossein Rajaei; Sasan Amirabdollahian; Cinzia Menapace; Giovanni Straffelini; Stefano Gialanella

doi:10.20944/preprints202309.0391.v1

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preprints.org > chemistry and materials science > surfaces, coatings and films > doi: 10.20944/preprints202309.0391.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Microstructure and Wear Resistance of Fe3Al Coating on GCI Prepared by Direct Energy Deposition (DED)

Hossein Rajaei

^* ,

Sasan Amirabdollahian

Cinzia Menapace

Giovanni Straffelini

Stefano Gialanella

Version 1 : Received: 5 September 2023 / Approved: 6 September 2023 / Online: 7 September 2023 (03:12:09 CEST)

A peer-reviewed article of this Preprint also exists.

Rajaei, H.; Amirabdollahian, S.; Menapace, C.; Straffelini, G.; Gialanella, S. Microstructure and Wear Resistance of Fe₃Al Coating on Grey Cast Iron Prepared via Direct Energy Deposition. Lubricants 2023, 11, 477. Rajaei, H.; Amirabdollahian, S.; Menapace, C.; Straffelini, G.; Gialanella, S. Microstructure and Wear Resistance of Fe3Al Coating on Grey Cast Iron Prepared via Direct Energy Deposition. Lubricants 2023, 11, 477.

Abstract

In this study, the potential of Fe3Al coating material as an environmentally friendly alternative to coatings containing critical elements for brake discs was investigated. A buffer layer of Cr-Mo steel (Ferro 55) was applied to enhance coating quality and prevent the formation of hot cracks during solidification. Microstructural analysis of the cross-section of the coating showed that the buffer layer diffused into the Fe3Al coating, forming a combination of Fe3Al, Fe, and Fe3AlC0.5 phases. The tribological properties of the Fe3Al coating were evaluated by pin-on-disc tests using two different copper-free friction materials extracted from commercial brake pads. The wear results showed a coefficient of friction comparable to that of an uncoated disc, but with a reduction in Particulate Matter (PM) emissions, an interesting aspect that is gaining increasing importance in view of the upcoming international standards..

Keywords

DED; Fe3Al; wear; COF; emissions; brake disc

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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