Effect of Sintering Temperature and Reinforcement Concentration on the Tribological Behaviors of Hybrid Aluminum Matrix Nano Composite

Abstract

The objectives of this experimentation is to scrutinize the effect of sintering temperature and GNP concentration on novel hybrid aluminium self lubricating nanocomposite. The tribological properties of Al-Si/ γ-Al2O3 (6 wt.%)/ GNP (4-5 wt.%) composite sample has been studied in this research.. Spark Plasma Sintering syntheses route was used for the fabrication of the composite samples. The samples were prepared at three sintering temperature i.e. 450 ˚C; 500 ˚C; 520 ˚C with dwell time constant 10 minutes. The experimentally investigated properties are friction, wear, density, for the hybrid composites samples. Tribological testing was done on the ball-on-disc configuration at room temperature under dry sliding conditions under variable load 10-50 N and upto sliding distance 450 meters with other parameters i.e. frequency, stroke remain constant. The results highlights that both sintering temperature and GNP concentration helps to enhance the overall properties of composite samples. For surface morphology; wear scar analysis, elemental percentage concentration characterization tools i.e. Scanning Electron Microscopy; Electron Dispersion Microscopy; Raman analysis is used.

Impact of Heat Treatment Analysis on the Wear Behaviour of Al-14.2Si-0.3Mg-TiC Composite using Response Surface Methodology

“…At lower aging temperatures mainly 151° C the TiC reinforced in the Aluminium metal matrix composite (AMMC) exist in granular and forms clusters [11] which signifies the lower wear resistance but as the aging temperature is increased to 153° C due to thermal diffusion at phase interface, it is found to have a refined size and morphology of the coarse grain TiC particles, also it forms a uniformly distributed phase within the matrix this uniformity within the matrix will improve the strength and thereby wear resistance. It can be inferred from the analysis that a small change in ageing temperature can create a dramatic change in the way the material reacts to wear [23,24]. shallow grooves, severe delamination is observed in this specimen when 10 N load is applied with 5 hrs ageing time, the depth of shallow grooves can also be observed to be higher that both (b) and (c).…”

Comparison of Analytical and Experimental Force in Cylindrical Workpiece Drawing Process

“…For the first experimental base, for testing the theoretical model of the drawing force (1), the process of drawing solid cylindrical billets made of steel 45 (174-187 HB) through a deforming drawplate made of steel 9XC (58-61 HRC) is considered [10]. In this process, the tool used is similar to that of the works [8,9,13,14]; their working surface is strengthened by the creation of a regular micro-relief in the form of single-turn threaded channels with a radius of 1.5 mm, a pitch of 0.5 mm, and an initial depth in the calibration-strip section of 10µm. [10,13].…”

“…The drawing speed is 1 m/min. The lubricant employed is I-40 mineral oil with an admixture of oil-soluble "Valen" metal-coating additive at 50 vol %, realizing the fundamental scientific principle "Garkunov-Kragelsky effect, friction without wear (selective transfer)" [4,9,10,13,14,25]. Figure 3 presents the schematic view of the experimental setup: a thin-walled cylinder 1 with a cavity 2 for lubricant.…”

“…Applied to solid cylindrical profiles, the current methods of processing are systemically and intensively improved through the use of selforganizing tribotechnologies, which include regularizing microgeometry and surface modification of a drawing tool and workpiece, as well as various methods of influence by metal-clad lubricants that allow realizing the fundamental scientific principle "Garkunov-Kragelsky effect, friction without wear" [4][5][6][7][8][9][10][11][12][13][14][15]. This machining method allows to reduce the drawing force by 25-75%, and to increase quality and productivity up to two times.…”

“…This machining method allows to reduce the drawing force by 25-75%, and to increase quality and productivity up to two times. It also allows forming a protective film ("servo-Witte") which contributes to a significant reduction in the cost of drawing tools [9][10][11][12][13][14][15].…”