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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...
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...
Dry sliding tribological properties and worn subsurface microstructures were investigated in Cu–Al alloys with Al concentrations of 0–2.2wt%. It was found that the wear volume of Cu–Al alloys decreases with an increasing Al content below 0.5wt%, and increases at higher Al contents above 0.5wt%. For each sample, a worn subsurface layer is generated consisting of dynamic recrystallization (DRX) structures...
The non-lubricated, ball-on-flat sliding friction and wear properties of in situ (TiB 2 +TiC)/Ti 3 SiC 2 composites against bearing steel ball were investigated. The load was varied from 10 to 30N. The material without TiB 2 shows an increasing friction coefficient with the increasing load. However, for (TiB 2 +TiC)/Ti 3 SiC 2 composites, the...
Dry sliding tests were performed on as-cast magnesium alloys Mg 97 Zn 1 Y 2 and AZ91 using a pin-on-disc configuration. Coefficients of friction and wear rates were measured within a load range of 20–380 and 20–240N at a sliding velocity of 0.785m/s. X-ray differactometer, scanning electron microscopy, tensile testing machine were used to characterize the microstructures and...
The impact of thermal barrier coatings by hard projectiles at high temperature has been analyzed. Three different domains have been explored: each differentiated by particle size, velocity, temperature and TBC composition. Domain I applies when the projectile creates deeply penetrating plastic/densification zones. In this case, short time elastic effects are relatively unimportant. The response is...
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