Wear of different material pairings for the cylinder liner – piston ring contact

Abstract

Purpose-This paper aims to investigate the wear behaviour of different materials for cylinder liners and piston rings in a linear reciprocating tribometer with special focus on the wear of the cylinder liner in the boundary lubrication regime. Design/methodology/approach-Conventional nitrided steel, as well as diamond-like carbon and chromium nitride-coated piston rings, were tested against cast iron, AlSi and Fe-coated AlSi cylinder liners. The experiments were carried out with samples produced from original engine parts to have the original surface topography available. Radioactive tracer isotopes were used to measure cylinder liner wear continuously, enabling separation of running-in and steady-state wear. Findings-A ranking of the material pairings with respect to wear behaviour of the cylinder liner was found. Post-test inspection of the cylinder samples by scanning electron microscopy (SEM) revealed differences in the wear mechanisms for the different material combinations. The results show that the running-in and steady-state wear of the liners can be reduced by choosing the appropriate material for the piston ring. Originality/value-The use of original engine parts in a closely controlled tribometer environment under realistic loading conditions, in conjunction with continuous and highly sensitive wear measurement methods and a detailed SEM analysis of the wear mechanisms, forms an intermediate step between engine testing and laboratory environment testing.

Improved mechanical and wear characteristics of hypereutectic aluminium-Silicon alloy matrix composites and empirical modelling of the wear response

“…The G6-R11 (with optimum combination of improved mechanical and wear properties) and the G7-R11 (with superlative wear properties) ABCs are proposed as suitable materials for cylinder liners of automobile engines. Both composites show mechanical and wear properties in the same range with typical gray cast iron cylinder liners (Wopelka et al, 2018), however, with about 70% reduction in density.…”

Piston Ring Material in a Two-Stroke Engine Which Sustains Wear Due to Catalyst Fines

“…Parameters which have to be considered for ranking material of the piston ring and cylinder liner in conditions during combustion are: material microstructure, surface topography, the lubricant and the different operating conditions ranging from boundary to hydrodynamic lubrication [25].…”

Evaluation of Wear Measurement With Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

“…A continuous measurement method for wear monitoring is required for this investigation. Radioactive isotopes proved to be efficient tracers that allow for high-sensitive wear measurement [15], but also continuous monitoring of wear progress, e.g., applied on metallic engine components [16], [17]. For using such a method, one or both interacting bodies need to be irradiated by, e.g., thin layer activation (TLA) [15], [17]- [19].…”

“…The wear of different materials can be measured parallel and continuously by using different isotopes [15]. Previous studies have shown that such a tracer method is suitable for wear studies on different materials or under various loading conditions [16], [20], [21]. Berlet et al [22] and Faller et al [23] used radio nuclide tracers for DLC wear studies and found loading condition dependent wear rates.…”