Wang, ZhiGeorgarakis, KonstantinosZhang, W. W.Prashanth, Konda GokuldossEckert, Juergen H.Scudino, Sergio2017-04-262017-04-262017-04-23Wang Z, Georgarakis K, Zhang WW, et al., Reciprocating sliding wear behavior of high-strength nanocrystalline Al84Ni7Gd6Co3 alloys. Wear, Volume 382–383, July 2017, pp. 78-840043-1648http://dx.doi.org/10.1016/j.wear.2017.04.013https://dspace.lib.cranfield.ac.uk/handle/1826/11827Nanocrystalline Al-Ni-Gd-Co alloys with exceptionally high hardness have been recently developed from amorphous precursors. In the present work, the reciprocating sliding wear in the gross slip regime of these novel nanocrystalline Al-based alloys has been investigated under small amplitude oscillatory sliding motion using a martensitic chrome steel as the counter material. When compared to pure Al or Al-12Si alloy, these nanocrystalline alloys exhibit excellent wear resistance and a lower coefficient of friction when sliding against steel. The enhanced wear resistance of the novel nanocrystaline Al alloys is related to their ultra-high hardness and the hybrid nanostructure that mainly consists of nanometric intermetallic phases embedded in a nanocrystalline fcc-Al matrix. Three body abrasive conditions were created at the initial stages of the wear tests due to the formation of micro- and nano-particulate debris from the worn surface of the Al alloys; the debris was compacted under the subsequent sliding cycles forming layers that are protective to the extensive wear of the Al alloys.enAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/WearNanocrystalline alloysAl alloysReciprocating sliding wearFretting wearTribological behaviorArticle