Parametric study on the dry sliding wear behaviour of AA6082–T6/TiB2 in situ composites using response surface methodology

Abstract

Present work deals with the parametric study of dry sliding wear behaviour of TiB 2-reinforced aluminium matrix composites (AMCs). Aluminium 6082-T6 alloy specimens reinforced with 0, 3, 6, 9 and 12 wt% of TiB 2 particles were fabricated by the in situ reaction of K 2 TiF 6 and KBF 4 in heated liquid aluminium. Experiments were conducted to study the wear behaviour of AA6082-T6/TiB 2 composites using pin-on-disc apparatus at room temperature. Weight percentage of reinforcement, sliding speed, load and sliding distance were the process parameters studied in the present investigation, with five different levels of each parameter. The parametric optimization was done employing response surface methodology. The results confirmed that an increase in the amount of reinforcement and sliding speed decreased the wear loss, and an increase in load and sliding distance increased the wear in TiB 2-reinforced AMCs. However, the relative significance of these parameters on the sliding wear resistance of the AMCs was very much different. Analysis of variance showed that the sliding distance was the most dominating factor with 65.28% to influence the wear loss in the fabricated composites; it was preceded by the sliding speed with 14.78%, load (9.39%) and reinforcement percentage (3.86%), respectively. The present model was validated by conducting confirmation tests. Thus in this work an accurate wear model has been developed, and it can be used as a predictive tool for wear applications.

ZrB2 nanoparticles transmuting tribological properties of Al3Zr/AA5052 composite

“…Particulate-reinforced aluminium matrix composites (PRAMCs) have wide applications in automobiles and railway vehicles parts due to their superior tribological properties than un-reinforced alloys [1][2][3]. PRAMCs reinforced with single reinforcement generally exhibit marginal improvement in wear resistance as compared to base alloy [4,5].…”

“…However, multiple particulate reinforcements in the PRAMCs improve wear resistance extensively. Different materials have been synthesized by multiple reinforcements with promising results [6][7][8][9], but the work is limited with Al 3 Zr and ZrB 2 combination [1,[10][11][12]. The Al 3 Zr exhibits low density, high melting point and high elastic modulus with excellent resistance to oxidation and corrosion [2].…”

Characterization of physical and mechanical properties of aluminium based composites reinforced with titanium diboride particulates

“…However literature suggests that particle agglomeration can enhance composite's performance when well bonded with the matrix. 18 Figure 7(e) shows the SEM micrograph of Al2024-9% TiB 2 composite (at higher magnification). Figure 7(e) depicts that the shape of TiB 2 particles are hexagonal or spherical.…”

“…Compared to other ceramic reinforcements, titanium diboride emerged to be the most promising reinforcement as no detrimental by-product is formed between the matrixreinforcement interfaces and excellent interfacial bonding is achieved which contributes to the improvement in mechanical properties of the prepared AMCs. 18 Fabrication of AMCs can be accomplished by different techniques viz. stir casting, friction stir processing, powder metallurgy and severe plastic deformation.…”

Assessments of Process Parameters on Cutting Force and Surface Roughness during Drilling of AA7075/TiB2 In Situ Composite

“…Singh et al [ 26 ] studied the dry sliding wear behaviour of AA6082–T6/TiB 2 in situ composites using response surface methodology. Yasir et al [ 27 ] studied SiC and alumina reinforced Al 6061 fusion composite and reported that the wear resistance of 15 wt.% filler reinforced hybrid composite is better than that of 5 wt.% filler reinforced composite. Zhu et al [ 28 ] conducted a drilling of aluminum 2024-T351/titanium Ti6Al4V stack and studied the mechanism of chip formation.…”