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Cavitation erosion causes serious problems for hydraulic machinery. Selective laser melting (SLM), is a type of additive manufacturing that can produce metal parts directly and it has begun to be used in various industrial settings. However, the erosion properties of the SLM processed parts have only rarely been reported. The paper addresses the cavitation erosion behavior of AlSi10Mg samples fabricated...
The titanium alloy Ti6Al4V is widely used in industry due to its high strength-to-mass ratio and good performance at high temperature. However, it exhibits poor tribological performance. The selective laser melting (SLM) process increases the application range of Ti6Al4V because of its flexibility for prototyping any part and its low material waste. In the present paper, three types of Ti6Al4V samples...
The objective of this study is to evaluate the effect of slip ratio on the wear and rolling contact fatigue (RCF) of wheel/rail materials using a rolling–sliding wear testing apparatus. The results indicate that two wear types are presented in terms of wear rate: type I (mild wear) and type II (severe wear). In type I wear, cracks propagate parallel to the surface. While in type II, the peeling is...
Selective laser melting is an additive manufacturing technology that produces metal parts; 316L stainless steel is one of the most widely used material in the selective laser melting process. The tribology performance of selective laser melting processed parts is critically important for industrial applications but related studies are rare. In this study, friction and wear behaviors of 316L stainless...
Axial piston pumps are widely used under severe conditions because they are able to operate highly efficiently at high pressure and various ranges of speed. However, pump efficiency is relatively low at low speed because of insufficient lubrication. The contact between the port plate and cylinder barrel is critically important because insufficient lubrication from this pair causes rapid wear and high...
In addition to contaminants such as dirt, precipitation and leaves, iron oxides are constantly present on railway wheel and rail surfaces. Iron oxides potentially influences adhesion and wear between wheels and rails, which in turn affect railway operation, safety and maintenance. Surface roughness also has a large impact on wheel−rail adhesion and wear. Rolling−sliding tests were conducted on a typical...
Railway vehicles require a certain level of wheel–rail adhesion for efficient, reliable, and economical operation. A comprehensive wheel–rail contact model is useful for optimizing the adhesion, to simulate vehicle running conditions and to predict wear and rolling contact fatigue. A new contact model using measured 3D surfaces has been developed, comprising normal contact, rolling–sliding contact,...
Adhesion in the wheel–rail contact is a key factor determining stable running conditions and safety during train driving and braking. This paper presents an experiment performed in a mini-traction machine to simulate the problems of low adhesion in the wheel–rail contact. Tests were conducted under dry conditions and using water or oil as lubricants to study the influence of surface roughness on the...
Composite electrodeposited coatings consisting of hard or lubricous micron sized reinforcement particles within a metal matrix have been used commercially in a number of high wear resistance and low friction applications over the last 40 years. In recent years, it has been demonstrated that this process may be extended into the nanoscale regime, using high performance nanoscale reinforcement particles...
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