DEVELOPMENT AND MORPHOLOGICAL STUDY OF THE STIR CAST AL/B 4 C COMPOSITE (original) (raw)
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Experimental Investigation on Mechanical Properties of Aluminium - Boron carbide Composites
International Journal of Scientific Research in Science, Engineering and Technology, 2023
In this investigation, metal-matrix composites of Aluminium matrix reinforced with boron carbide (B4C) particles were fabricated by stir casting technique. Aluminium is selected as the matrix material and boron carbide as reinforced particles are mixed in different weight percentages (0, 2.5, 5 and 7.5 wt %). The test samples were prepared as per ASTM standards to investigate mechanical properties. The experimental result reveals that the tensile strength and hardness increases with the increase in B4C percentage, whereas percentage elongation decreases with the increase in B4C percentage.
Fabrication and mechanical properties of aluminium-boron carbide composites
With the increasing demand of lightweight materials in the emerging industrial applications, fabrication of aluminium-boron carbide composites is required. In this context aluminium alloy-boron carbide composites were fabricated by liquid metallurgy techniques with different particulate weight fraction (2.5, 5 and 7.5%). Phase identification was carried out on boron carbide by X-ray diffraction studies. Microstructure analysis was done with scanning electron microscope. Scanning electron microscopy images shows that boron carbide particles are uniformly distributed in aluminium matrix. The composites were characterized by hardness and compression tests. With the increase the amount of the boron carbide, the density of the composites decreased whereas the hardness is increased. The ultimate compressive strength of the composites was increased with increase in the weight percentage of the boron carbide in the composites.
IRJET, 2021
Stir casting is an economical method to produce Aluminium matrix composites (AMCs). In the present work, Aluminium alloy AA6061 reinforced with various amounts (1, 2 & 3 wt. %) of Boron Carbide particles were prepared. The matrix alloy was melted in a casting furnace and with the help of the automatic stirrer, a vortex is formed. Boron Carbide particles were added to the periphery of the vortex and the composite melt was solidified in a permanent mold. The microstructures of the AMCs were studied using and scanning electron microscopy. Boron Carbide particles were observed to refine the grains and were distributed homogenously in the Aluminium matrix. Boron Carbide particle clusters were also seen in a few places. Boron Carbide particles were properly bonded to the Aluminium matrix. The reinforcement of Boron Carbide particles improved the hardness, wear, and Microstructure analysis of the AMCs.
PROCEEDING OF THE 1ST INTERNATIONAL CONFERENCE ON ADVANCED RESEARCH IN PURE AND APPLIED SCIENCE (ICARPAS2021): Third Annual Conference of Al-Muthanna University/College of Science
Powder technology is characterized by the production of models with multiple application characteristics in different industries that require strength in durability and light weight such as aircraft parts and internal combustion engines. The current study employs this technology to produce models from a mineral base of aluminum (Al) reinforced with Al2O3 with a fixed rate of 5%, and in different proportions of B4C boron carbide of % (0,5,10,15,20). The preparation process was conducted by mixing the powders for three consecutive times (2,4,6) hours with a homemade mill containing steel powder and steel balls. Hydraulic press is used to generate samples at a pressure (100 bar) and for a time of one minute; the samples produced from the mold are of green density and require a sintering process for the purpose of increasing the hardness and durability. The physical characteristics of the samples included (Bulk density and true porosity). The wear rate was studied and the samples produced good results after the sintering procedure at six hours of milling. The results showed a bulk density of (2.128g/cm 3), a true porosity (9.98%) and lower wear rate of (1.59×10-8 g/cm). It was thus found that the best grinding time that produced good physical and mechanical properties is six hours, and the best strengthening ratio is 20% B4C when sintering at 560°C.
IJERT-Mechanical Characterization of Stir Cast Al 356-B4C Composite
International Journal of Engineering Research and Technology (IJERT), 2021
https://www.ijert.org/mechanical-characterization-of-stir-cast-al-356-b4c-composite https://www.ijert.org/research/mechanical-characterization-of-stir-cast-al-356-b4c-composite-IJERTV10IS040283.pdf The development of light weight material for industrial utilities attracted Aluminum composites as this material have superior mechanical properties over unreinforced alloy. The present investigation focused on utilization of boron carbide into Al356 alloy fabricated by stir casting. The Boron Carbide particle weight fractions of 3, 6,9, 12 % wt. of particle sizes 53-106 μm were reinforced into matrix material. The scanning electron microscopy (SEM) was done to see distribution of the B4C particles in the matrix. The evaluation of mechanical properties viz; tensile strength, compressive strength, density and hardness were carried out. It was found that the tensile strength, compressive strength and hardness of the metal matrix composite (MMC) increases as weight fractions of the B4C particles increases. Also density of composite decreases subsequently. So boron carbide has potential to fabricate strengthened metal matrix composite for diverse Al alloy applications.
Mechanical characterization of aluminum reinforced with boron carbide metal matrix composites
1ST INTERNATIONAL CONFERENCE ON MANUFACTURING, MATERIAL SCIENCE AND ENGINEERING (ICMMSE-2019), 2019
Advanced engineering materials with high end mechanical, electrical and magnetic properties are required for Material technology and Engineering design field. Mostly Ceramic particles like Al2O3, BORON are reinforced with Aluminum metal matrix for their rectified mechanical properties like hardness, toughness, and low wear rate to befit engineering industries requirements. Boron carbide reinforced Al metal matrix composites has inviting properties like good tensile strength, high hardness and low density on comparing with Al-BORON composites have been shown by recent researches. This paper deals with developing lightweight Aluminum-Boron carbide composites and also evaluate the mechanical properties with consequences of calcium carbide particles addition. To fabricate & testing mechanical properties of Aluminum metal matrix composites with Boron Carbide and Calcium Carbide reinforcements at various volume proportions is the goal of this paper. By integrating boron carbide and calcium carbide particles, Mechanical properties like tensile strength, impact strength and hardness of newly developed metal matrix composites rectified indicatively.
Gas atomized Al (6061) powder particles were used to synthesize nano-structured Al based composite powders reinforced with 2 and 5wt.% of nano and micro sized boron carbide particles by mechanical alloying. These composite powders as well as the un-reinforced Al powders were compacted by cold uniaxial pressing. In order to investigate the effect of consolidation procedures on the properties of the resultant Al-BC composites, a number of the samples were subjected to sintering at 620 °C for 2h while the others were hot extruded at 520 °C with t he extrusion ratio of 8:1. The effect of percentage and size of B4C on the density, hardness and mechanical properties (such as yield strength, compression strength) of the composites were evaluated and compared with those of the un-reinforced alloy. The fractured surfaces of the samples were studied by scanning electron microscopy (SEM). The results of the present study revealed a higher hardness for the extruded samples as compared with their sintered counterparts attributable to their increased density and decreased matrix grain size. It was also shown that addition of 2 and 5wt.% of B C nano-particles increased yield strength of the extruded samples by 3 and 4 times respectively as compared with the un-reinforced aluminum.
Materials Today: Proceedings, 2019
This paper reviews different experimental and theoretical studies related to B4C reinforced aluminum metal matrix composites (MMC). Various processes like solid sintering, powder processing through ball milling, and also various thermo-mechanical processing like heat treatment, quenching are discussed. The effects on the particle size of boron carbide (B4C) reinforcement on morphology evolution and microstructure are thoroughly studied. The strengthening mechanisms of B4C reinforced Al-MMC are thoroughly reviewed and the interfacial structure in between B4C and matrix material are discussed.
International Journal of Engineering Research and Technology (IJERT), 2020
https://www.ijert.org/a-comparative-study-of-machinability-of-aluminium-and-its-composite-with-boron-carbide-by-varying-grain-size https://www.ijert.org/research/a-comparative-study-of-machinability-of-aluminium-and-its-composite-with-boron-carbide-by-varying-grain-size-IJERTV9IS090372.pdf Aluminum metal composite are the most encouraging material which gives most noteworthy mechanical quality in the field of hard machined material. Inferable from its higher strength to weight proportion, it is widely applied in the aeronautical assembling and aviation industries. Throughout the long term, researchers continuously practices to reduce the cost of machining process and numerous analysts have indicated unmistakable fascination for expanding further developed machining measure. During machining of aluminum compound materials, the proper machining and cooling circumstances assume a basic part as it influences the machinability. In this study, three samples are taken pure aluminium particle size 50 micron (approx), aluminium with 10% reinforcement of boron carbide with 50 nanometer (approx). The effect of varying cutting speed and feed rate was analyzed on factors like feed force, cutting force, surface roughness and tool wear (Crater and flank wear). It was observed that at low feed rate and at high speed the machining of material was preferable.
TRIBOLOGICAL PROPERTIES ON ALUMINIUM (LM25) REINFORCED WITH BORON CARBIDE AND TUNGSTEN CARBIDE
The major driving force in an automotive industry is to develop & implement the new materials for the reduction of mass, fuel consumption & vehicle emissions. Some automotive parts like engine cylinder, connecting rods, pistons & brake system are not satisfactory in Tribological properties, making increase in wear loss & decrease in hardness of the materials. Recently, Hybrid Metal Matrix Composites have evolved alternative to MMC. Hybrid Metal Matrix Composites are the composites having more than one reinforcement particulates. The main advantage of this type of composites can withstand high temperature; high wear resistance compared to MMC. Aluminium based Hybrid Metal Matrix Composites are widely used in automotive applications because of their good potential characteristics. In the present work, Hybrid Aluminum Metal Matrix Composite samples are fabricated by base metal Aluminium (LM25) reinforced with Boron Carbide (B 4 C) of different weight percentages like 1.5%, 3%, 4.5% & Tungsten Carbide (WC) of constant weight percentage 1.5% by varying stirrer speed (200, 250 & 300rpm) by using Stir Casting method. Evaluation of Tribological properties of the composite samples is studied. Microstructure examination was done using Scanning Electron Microscope (SEM) to obtain distribution of B 4 C & WC particulates in Al (LM25) matrix.