Application of Taguchi Method for Optimization of Process Parameters for Wear loss of LM25/Flyash Composite
Metal matrix composites (MMCs) are now gaining their usage in tribological industries because of their inherent properties like high strength to weight ratio, low wear rate etc. The present study deals with investigation relating to the influence of wear parameters like sliding speed, applied load, reinforcement wt% and sliding distance on the dry sliding wear. A pin-on-disc apparatus was used to conduct the dry sliding wear test. The design of experiment approach was employed to acquire data in controlled way using Taguchi method. Multiple regression analysis, Signal-to-Noise ratio and Analysis of Variance were employed to investigate the wear behaviour of aluminium composite. The incorporation of fly ash as reinforcement material in aluminium matrix material improves the tribological characteristics.
Effect of reinforcement of flyash on sliding wear, slurry erosive wear and corrosive behavior of aluminium matrix composite
Abstract In the present experimental investigation, Al (12 wt% Si) as matrix material and up to 15 wt% of flyash particulate composite was fabricated using the liquid metallurgy route. The wear and friction characteristics of the composite in the as-cast conditions were studied by conducting sliding wear test, slurry erosive wear test and fog corrosion test. The sliding wear behavior of the MMCs were investigated by varying parameters like normal load, percentage flyash, and track velocity. Pin-on-disc wear testing machine was used for investigating sliding wear behavior. In slurry erosive wear studies, percentage flyash and pH value of the slurry were used as variables. Corrosion studies were carried out using fog corrosion test. The specimens were exposed to a fog of NaCl. The worn surfaces were analyzed using optical microscope and scanning electron microscope. The results indicate that the wear resistance of the flyash reinforced material increased with increase in flyash content, but decreases with increase in normal load, and track velocity. The microscopic examination of the worn surfaces, wear debris and subsurface shows that the base alloy wears primarily because of micro cutting. But the MMCs wear because of delamination, micro cutting, oxidation and thermal softening. Corrosion has increased with increase in flyash content.
Effect of magnesium addition on wear behaviour of Al–70 vol.-%Al2O3p composites
Abstract Inthisstudy, drysliding and abrasive wear behaviour ofAl-70 vol.-%Al2O3particulate composite alloyed with Mg was examined. The composites were produced by a pressure infiltration casting technique. The composition of the matrix varied between 0 and 8 wt-%Mg, and the diameter of the Al2O3 particulates was 60 μm. Dry sliding wear tests were carried out on an unlubricated M2 quality high speed tool steel disc by a pin on disc type wear tester. Abrasive wear tests were run by rubbing the composites on abrasive Al2O3 grains. The results of the wear tests revealed that, both dry sliding and abrasive wear resistance ofthe composites increased with increasing Mg content in the matrix.