Corrosive wear of multi-layer Fe-based coatings laser cladded from amorphous powders

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dc.cclicenceCC-BY-NC-NDen
dc.contributor.authorJi, Xiulin
dc.contributor.authorLuo, Chanyuan
dc.contributor.authorSun, Yong
dc.contributor.authorZhao, Jianhua
dc.date.acceptance2019-11-01
dc.date.accessioned2019-11-11T14:43:17Z
dc.date.available2019-11-11T14:43:17Z
dc.date.issued2019-11-04
dc.descriptionThe file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.en
dc.description.abstractSince amorphous alloys exhibit good wear and corrosion resistance, they are supposed to be applied as a candidate implant material. In this work, using laser cladding, Multi-layer Fe-based alloy coatings were fabricated from amorphous powders on 316L stainless steel (SS) substrate. When the number of cladding layers increases, the microstructure of the coating was mainly composed of γ-Fe firstly, then evolved to γ-Fe and α-Fe solid solutions, and then to a composite of amorphous and crystalline phases. The surface hardness of the coating was also enhanced consequently to over 1200 HV. During reciprocate sliding against an Alumina ball in a simulated body fluid (Ringer’s solution), the volume loss and the coefficient of friction (COF) of the coatings generally decreased firstly and then increased with the number of cladding layers. During sliding at open circuit, the drop in open circuit potential (OCP) of all the Fe-based coatings, except for the 1-layer one, was not as significant as that of the 316 SS substrate. Moreover, when applying a cathodic potential during sliding, no obvious protective effect was obtained for the coatings, which indicates that the multi-layer Fe-based coatings possess a good corrosion-induced wear resistance in comparison to 316L SS. Because of the formation of an electric double layer, the fixed potential of 100 mVSCE or -600 mVSCE was beneficial to reduce the COF, especially for 316L SS. The tribocorrosion at OCP showed that the 2-layer coating possessed the best corrosive wear resistance, and its COF and volume loss were about 3 and 5.6 times lower than those of the substrate. The material loss in Ringer’s solution at OCP is mainly controlled by the mechanical wear for the coatings and the synergism between corrosion and wear for the substrate. Furthermore, this work provides a way to optimize the tribology system by adjusting the number of cladding layers to reduce COF and wear in a simulated body fluid.en
dc.funderOther external funder (please detail below)en
dc.funder.otherRoyal Society-NSFC International Exchange Programen
dc.identifier.citationX. Ji, C. Luo, Y. Sun, J. Zhao, (2019) Corrosive wear of multi-layer Fe-based coatings laser cladded from amorphous powders. Wear, 438-439, 203113en
dc.identifier.doihttps://doi.org/10.1016/j.wear.2019.203113
dc.identifier.urihttps://dora.dmu.ac.uk/handle/2086/18754
dc.language.isoenen
dc.peerreviewedYesen
dc.projectidIE161010, 51711530226en
dc.publisherElsevieren
dc.researchinstituteInstitute of Engineering Sciences (IES)en
dc.subjectcorrosive wearen
dc.subjectmetal matrix compositesen
dc.subjectamorphous alloyen
dc.subjectpolarizationen
dc.subjectcoatingsen
dc.subjecttribocorrosionen
dc.titleCorrosive wear of multi-layer Fe-based coatings laser cladded from amorphous powdersen
dc.typeArticleen

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