Effects of functionally gradient structure of Ni3Al metal matrix self-lubrication composites on friction-induced vibration and noise and wear behaviors. (July 2019)

• Record Type: Journal Article
• Authors: Lu, Guanchen; Shi, Xiaoliang; Liu, Xiyao; Zhou, Hongyan; Chen, Yuan
• Is Part Of: Tribology international. Volume 135(2019)
• Page Start: 75
• Page End: 88
• Publication Date: 2019-07
• Subjects: Gradient structure -- Friction-induced vibration and noise -- Wear characteristics -- Ni3Al metal matrix composites; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.02.037
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The effects of functionally gradient structure of graphene nanoplatelets (GNPs) reinforced Ni3 Al metal matrix composites (GNMMCs) prepared by laser melting deposition on the tribological performance, as well as friction-induced vibration and noise are investigated. Results show that GNMMCs with GNPs gradient structure can improve the tribological performance and weaken the intensity of high frequency vibration and noise under the variable loadings, which are affected by the synergy effects of lubricant and gradient structure. High level of GNPs content in contact interface layer allows an easier GNPs deposition and promote the formation of smooth surface. GNMMCs with gradient hardness change has the abilities of absorbing heavy loads and resisting the deformation of contact interface. Hence, friction-induced vibration and noise is reduced. Graphical abstract: Image 1 Highlights: The gradient Ni3 Al self-lubricating composites (GNMMCs) is prepared. Friction and wear behavior is tested under two kinds of loading conditions. The sources of friction-induced vibration and noise are investigated. The inherent correlation between noise signals and worn states is discussed.