Influence of porosity on dry sliding wear behavior in spray deposited Al–6Cu–Mn/SiCp composite

Processing and dry sliding wear performance of spray deposited hyper-eutectic aluminum–silicon alloys

“…This was attributed to the fact that the porosity may help the discretely distributed second phase particles (silicon in this case) in the matrix absorb impact energy during the erosion process. Gui et al (2000) have conducted dry wear performance tests on the Al-Cu spray deposited composites having about 4.8% porosity at various loads. It was observed that under mild loading conditions of up to 2 MPa, there is no influence of the porosity on the wear performance of these composites.…”

Dry sliding wear of MAO-coated A356/20vol.% SiCp composites in the temperature range 25–180°C

“…It is reported that MML plays an important role in the wear of aluminum alloys and its composites against steel counterpart [12,13,22,23]. MML is a mixture of ␣-Al, ␣-Fe, ␣-Al 2 O 3 , and AlFe or Al 13 Fe 4 created during the sliding process and shows much higher hardness value than that of corresponding matrix materials [13,22,23].…”

“…MML is a mixture of ␣-Al, ␣-Fe, ␣-Al 2 O 3 , and AlFe or Al 13 Fe 4 created during the sliding process and shows much higher hardness value than that of corresponding matrix materials [13,22,23]. Venkataraman and Sundararajan [11] showed that the thickness of MML increased with increasing load in mild wear region and removal of MML is responsible for the onset of severe wear for aluminum alloys and its composites.…”

“…The process is similar to anodic oxidation, but it stimulates the growth of a surface layer which is thicker and denser than those produced by conventional anodizing [9]. The tribological behavior of particle-reinforced aluminum matrix composites has been extensively studied for more than last 3 decades [10][11][12][13][14][15]. Furthermore, several studies have examined the tribological properties of ceramic oxide layers obtained through MAO process on different aluminum alloy substrates [3,9,16,17].…”

Reciprocating Wear Behavior of Al Alloys: Effect of Porosity and Normal Load

“…Suh [35] observed that an increase in porosity content reduces the required length of cracks needed to link up pores which promotes delamination. Gui et al [36] considered the pores as crack sources which can be created when an external force is applied. At high porosity, materials have more interconnected pores, lower strength, and are much easier to deform and to be torn off.…”