Influence of TiC on dry sliding wear and mechanical properties of in situ synthesized AA5052 metal matrix composites

Abstract

In this paper, aluminium metal matrix composites were synthesized through in situ process in which aluminium alloy 5052 (AA5052) and titanium carbide were used as matrix and reinforcement materials, respectively. The microstructural characterization and formation of stable TiC phases were analyzed with the help of field emission scanning electron microscope, X-ray diffraction analysis, respectively. The 9% TiC-reinforced MMCs had shown a considerable improvement, i.e. 32% increase in hardness, 78% in ultimate tensile strength and 116% increase in yield strength when compared with the base alloy. The tensile fracture of the specimens shows dimples, voids, cracks, and ridges indicating the brittle nature. Further, the dry sliding wear properties of the composites were studied with the help of a pin-on-disc wear testing machine. The composite with 9% TiC exhibited a decrease in volumetric wear loss by 24% when compared with the base alloy at a load of 30 N. With increase in the TiC content and applied load, the COF values decreased linearly for the composites. The 9% TiC-reinforced composites show an abrasive mode of wear mechanism as a result of formation of deep grooves with no plastic deformation. With the improvement obtained in the wear properties, this metal matrix composite can be considered as a replacement for the conventional brake disc material used in the automobile industry.

Dry sliding wear behavior of Al 6082 metal matrix composites reinforced with red mud particles

“…The increase in ultimate tensile strength indicates the better bonding of red mud particles with the soft aluminum matrix. A similar trend can be found by other researchers taking different reinforcement with aluminum matrix [17]. The resistance exhibited by red mud particles hindered the dislocation, thus enhancing the tensile strength by Orowan strengthening [21].…”

“…Basavarajappa et al [16] studied the effect of SiC particles on the wear behaviour of Al2219/Gr hybrid composites and found that the wear resistance was enhanced with the addition of SiC whereas the wear rate was decreased. Samal et al [17] studied the wear properties of AA5052 MMCs reinforced with titanium carbide through in situ reaction method. With addition of TiC, the wear resistance of the composites was significantly improved.…”

Synthesis and characterization of zinc oxide reinforced aluminum metal matrix composite produced by microwave sintering

“…Existence of reinforcing element in the matrix generates intermetallic compound which holds better load bearing capacity compared to unreinforced phase of the material. 7 During the powder metallurgy process, milling action is responsible for the effective diffusion of the reinforcement and matrix phase which eventually governs the consolidation behavior of the material. Further, the sintering mechanism and heating environment play a vibrant role in determination of the overall material property.…”

“…The theoretical density of the composite material was obtained by applying ROM. 42 The calculation for the theoretical density was done as per the stated formula in equation (7). The variation of the relative density as a function of reinforcement percentage in the matrix material is shown in Figure 9 c ¼ w…”

“…1,2 Ceramic reinforcements like Al 2 O 3 , SiC, BN, TiB 2 , TiC, VC, Si 3 N 4 , Y 2 O 3 , and similar elements are widely engaged for the enhancement in the strength and modulus of aluminum (Al) since the ceramics are harder and have superior thermal stability. [3][4][5][6][7][8][9] The utilization of whiskers in the form of a different oneand two-dimensional structure enhances the material properties significantly. The whiskers hold good thermal, chemical, structural, and tribological stability over other particles when they are used for reinforcement in the metal matrix.…”