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EnglishIn this paper, the refurbishing of worn-out brake discs by coating with powder via direct energy deposition (DED) is evaluated. A medium carbon steel powder was used to coat cast-iron discs. Deposition of this steel was carried out directly on the disc surface or, alternatively, after a previous deposition of a buffer layer made of stainless steel. It was seen that the use of a buffer layer ensured a good coating adhesion, despite the formation of cast microstructures at the interfaces between the disc and the two different coatings (buffer and outer layer). Coated discs were tested against two different Cu-free commercial friction materials to evaluate their tribological properties. Very similar friction coefficients, specific wear rates, and total emissions were measured for both friction materials sliding against the coated disc. These tribological data are slightly higher with respect to those obtained in the case of an uncoated disc, suggesting that improvement of the top coating composition and surface finishing is necessary in order to achieve better performances.
Microstructural and Tribological Evaluation of Brake Disc Refurbishing Using Fe-Based Coating via Directed Energy Deposition / Rajaei, H.; Menapace, C.; Amirabdollahian, S.; Perini, M.; Straffelini, G.; Gialanella, S.. - In: METALS. - ISSN 2075-4701. - 12:3(2022), p. 465. [10.3390/met12030465]
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| Titolo: | Microstructural and Tribological Evaluation of Brake Disc Refurbishing Using Fe-Based Coating via Directed Energy Deposition | |
| Autori: | Rajaei, H.; Menapace, C.; Amirabdollahian, S.; Perini, M.; Straffelini, G.; Gialanella, S. | |
| Autori Unitn: | ||
| Titolo del periodico: | METALS | |
| Anno di pubblicazione: | 2022 | |
| Numero e parte del fascicolo: | 3 | |
| Codice identificativo Scopus: | 2-s2.0-85126004934 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.3390/met12030465 | |
| Handle: | http://hdl.handle.net/11572/338469 | |
| Citazione: | Microstructural and Tribological Evaluation of Brake Disc Refurbishing Using Fe-Based Coating via Directed Energy Deposition / Rajaei, H.; Menapace, C.; Amirabdollahian, S.; Perini, M.; Straffelini, G.; Gialanella, S.. - In: METALS. - ISSN 2075-4701. - 12:3(2022), p. 465. [10.3390/met12030465] | |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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