Abstract:Aluminum is a material with advantageous properties such as lightness, good conductivity, high plastic deformation ability, and superior corrosion resistance. However, aluminum and many aluminum alloys have disadvantages in terms of mechanical properties such as hardness, tensile strength, and wear resistance. To overcome this disadvantage of aluminum, it is a good method to add ceramic particles to the matrix. For this purpose, in this study, B4C (boron carbide)-reinforced AA2014 aluminum matrix composites we… Show more
“…The prepared form of WC reinforced aluminum matrix composite materials in accordance with the standard was presented in Figure 3. Figure 3. Tensile samples. 12 …”
Section: Methodsmentioning
confidence: 99%
“…When the literature is examined, the reinforcement elements used in aluminum matrix composite materials are generally silicon carbide (SiC), 6,7 titanium carbide (TiC), 8,9 and boron carbide (B 4 C). [10][11][12] Recently, tungsten carbide (WC) is also used as reinforcement material. WC has superior properties such as high hardness, certain amount of plasticity, and good wettability with molten metals.…”
Aluminum-based metal matrix composites are extensively used in applications in many industrial fields, especially in the aviation and automotive industry. The usage rate is increasing day by day. Therefore, it is very important to improve the mechanical properties of the composite structure. For this purpose, in this study, 3, 5, and 7 wt.% tungsten carbide (WC) reinforced aluminum matrix composite material was produced by stir casting method. The mechanical properties (tensile strength, hardness, wear) of the produced composite materials and their effect on machinability were investigated. The machinability process was performed in constant cutting speed, constant cutting depth, three different feed rates (0.05, 0.1, and 0.2 mm·rev−1), and dry environmental conditions. Wear tests were performed on dry sliding conditions, under 25 N load, covering different distances (150, 300, 450, and 600 m). In addition, the microstructure of the composite samples was analyzed using optical microscopy and scanning electron microscope. The phases in the composite material were determined using the X-ray diffraction technique. As a result of the experiments, with the addition of WC particles, the mechanical properties of the materials such as tensile strength, hardness, and wear resistance have increased and the machinability capability has decreased.
“…The prepared form of WC reinforced aluminum matrix composite materials in accordance with the standard was presented in Figure 3. Figure 3. Tensile samples. 12 …”
Section: Methodsmentioning
confidence: 99%
“…When the literature is examined, the reinforcement elements used in aluminum matrix composite materials are generally silicon carbide (SiC), 6,7 titanium carbide (TiC), 8,9 and boron carbide (B 4 C). [10][11][12] Recently, tungsten carbide (WC) is also used as reinforcement material. WC has superior properties such as high hardness, certain amount of plasticity, and good wettability with molten metals.…”
Aluminum-based metal matrix composites are extensively used in applications in many industrial fields, especially in the aviation and automotive industry. The usage rate is increasing day by day. Therefore, it is very important to improve the mechanical properties of the composite structure. For this purpose, in this study, 3, 5, and 7 wt.% tungsten carbide (WC) reinforced aluminum matrix composite material was produced by stir casting method. The mechanical properties (tensile strength, hardness, wear) of the produced composite materials and their effect on machinability were investigated. The machinability process was performed in constant cutting speed, constant cutting depth, three different feed rates (0.05, 0.1, and 0.2 mm·rev−1), and dry environmental conditions. Wear tests were performed on dry sliding conditions, under 25 N load, covering different distances (150, 300, 450, and 600 m). In addition, the microstructure of the composite samples was analyzed using optical microscopy and scanning electron microscope. The phases in the composite material were determined using the X-ray diffraction technique. As a result of the experiments, with the addition of WC particles, the mechanical properties of the materials such as tensile strength, hardness, and wear resistance have increased and the machinability capability has decreased.
“…Improvement in hardness, tensile strength, and density was also reported. Kara et al [25] evaluated the Influence of B 4 C on enhancing mechanical properties of A2014 aluminum matrix composites and it was concluded from their study that the increase in the B 4 C reinforcement ratio, the mechanical properties of the aluminum matrix composite material, such as wear resistance, cutting strength, and hardness, increased. It was also revealed by Kara et al that the tensile strength was increased initially with the addition of B 4 C but further addition of reinforcement resulted in the decrement of tensile strength.…”
In this work, AA5082 alloy is used as base alloy to fabricate aluminum composites using fine reinforced particles of boron carbide (B4C). The conventional method of stir casting is employed for the production of composites. The particles are used with varying weight % of 5, 10, 15 and 20 for the composite fabrication. The microstructures of the composites are examined using the Scanning Electron Microscopy and X-ray Diffraction patterns. The hardness of the composites is tested and found to increase from 73 HV in base alloy to 93 HV in the AA5082 composite having B4C proportion of 15%. However, a slight decrease in hardness is also observed at higher wt. % of B4C which could be due to agglomeration of particles. Evaluation of yield strength showed an escalation in the strong point with the addition of reinforced particles under the effect of orowan strengthening mechanism. Wear analysis conducted on Tribometer indicates that the escalation of load and sliding distance is proportional to the loss of material in composites whereas, wear declined with the rise of sliding speed. The micrograph examination of the wear tracks reveals the material removal mechanism from the composite as abrasive in nature. Pitting at certain places is also observed.
“…In the literature, AMCs are reinforced with materials such as Al 2 O 3 , SiC, TiC, B 4 C, magnesium oxide (MgO), and carbon nanotubes (CNTs) to increase the thermal stability, compression strength and wear resistance of the matrix. [16][17][18][19][20] In the other words, the reinforcement materials are selected according to the processing technique and the expected aim like thermal stability, process-ability, mechanical, and economic features. The main purpose of producing composite is to increase the weak properties of the matrix while preserving its good properties.…”
In this research, the aluminum (Al2024) matrix composites are reinforced with nano magnesium oxide (MgO) and multi-walled carbon nanotubes (MWCNTs). The aim of Al2024 alloy reinforced with MgO and MWCNTs is to reveal the effects of the reinforcement particle ratio on the microstructure and mechanical properties of the hybrid composites, to find the optimum hybrid ratio, and to form a stronger hybrid composite. The composites with the different hybrid ratios are produced via stir casting method. The theoretical and measured densities and porosity content of the composites are studied. The microstructure and fracture surface of the composites are examined by optical microscopy, scanning electron microscopy (SEM), and electron dispersive spectrum (EDS). The hardness, compression, and tensile properties of the composites are studied in this work. Results indicated that the hardness of the aluminum (Al) matrix composites (AMCs) is significantly improved after the reinforcement with MgO and carbon nanotube (CNT), and also heat treatment of T6. The stress–strain curve of the composites is tested by a material testing machine. The maximum tensile and compression strengths are obtained at Al2024-0.2 wt.% (MgO 50% + CNT 50%) the composite as 226 MPa and 684 MPa, respectively .The hardness, compression, and tensile strengths of the hybrid composites are higher than 1.51, 1.39, and 1.31 than that of the base metal. After heat treatment of T6, the maximum harness, compression, and tensile strengths are obtained by 102 HB, 730 MPa, and 277 MPa, respectively, which are 1.82, 1.49, and 1.61 times higher hardness than that that of the base Al2024 alloy. The main strengthening mechanism of nano-MgO particles and MWCNTs-reinforced Al2024/MgO/CNTs composites is observed by the precipitation strengthening mechanism.
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