Effect of alloying elements on the mechanical behavior of microwave synthesized composites
TL;DR: In this paper, three different composites are processed through powder metallurgy route using Aluminum Alloy (AA) 2900, 2024 and 2219 as matrix with SiC, Al2O3 and graphene as reinforcement.
About: This article is published in Procedia Manufacturing.The article was published on 2019-01-01 and is currently open access. It has received 1 citations till now. The article focuses on the topics: Powder metallurgy & Aluminium alloy.
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TL;DR: In this paper , the sliding wear behavior of stir cast silicon nitride (Si3N4) and graphite (Gr) reinforced Al-Zn-Cu-Mg (Al alloy) matrix composites were investigated under dry conditions.
Abstract: The sliding wear behavior of stir cast silicon nitride (Si3N4) and graphite (Gr) reinforced Al–Zn–Cu–Mg (Al alloy) matrix composites were investigated under dry conditions. Al alloy/1 wt.% Si3N4 composite, Al alloy/1 wt.% Si3N4–xGr hybrid composites (x = 1.5 and 3% Gr by weight) were separately developed to examine their wear behavior. Microstructure and EDS characterization were used to identify the reinforcement (Si3N4 and Gr) in casted composites. Experimental design with L–27 orthogonal matrix array was chosen to perform the wear experiments to examine the effect of various applied normal loads (15 N, 30 N, and 45 N) and sliding velocities (0.523, 1.047, and 1.57 m/s) at a constant sliding distance of 1000 m. Results reveal that the wear rate significantly decreased after adding 1.5 and 3 wt.% Gr in Al– Si3N4 composite and obtained a minimum wear rate for hybrid composites containing 3 wt.% Gr particles. ANOVA results revealed that load is the most dominating factor in wear rate, followed by sliding velocity and Gr content. The worn surface study observed lesser micro-cracks and pits in the hybrid composite containing 3 wt.% Gr compared to Al– Si3N4 composites. The uniform distribution of reinforcing particles in the Al alloy matrix was examined through SEM characterization of casted samples.
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TL;DR: Microwave sintering has emerged as a new method for sinterding a variety of materials that has shown significant advantages against conventional sinterging procedures as mentioned in this paper. But microwave sinterings are not suitable for all materials.
911 citations
TL;DR: In this paper, the effect of alumina particle size, sintering temperature and time on the properties of Al-Al 2 O 3 composite were investigated, including density, hardness, microstructure, yield strength, compressive strength and elongation to fracture.
345 citations
TL;DR: In this article, the main focused aim of developing new processing and manufacturing technologies are to reduce production or manufacturing costs, processing times, and to enhance manufactured product properties, and the developed processing techniques should be widely acceptable for all types of materials including metal matrix composites, ceramics, alloys, and fiber reinforced plastics.
Abstract: The main focused aim of developing new processing and manufacturing technologies are to reduce production or manufacturing costs, processing times, and to enhance manufactured product properties. The developed processing techniques should be widely acceptable for all types of materials including metal matrix composites, ceramics, alloys, and fiber reinforced plastics. Microwave materials processing is emerging as a novel processing technology which is applicable to a wide variety of materials system including processing of MMC, FRP, alloys, ceramics, metals, powder metallurgy, material joining, coatings, and claddings. In comparison to the conventional processes, microwave processing of materials offers better mechanical properties with reduced defects and economical advantages in terms of power and time savings. The present review work focuses mainly on global developments taking place in the field of microwave processing of materials and their relevant industrial applications.
278 citations
TL;DR: In this paper, the development in processing, properties and utilisation of light metal matrix composites is reviewed and other potential metal matrix composite materials, such as corrosion and wear resistant steel matrix composite composites are discussed.
184 citations
TL;DR: Particle effects on friction and wear of 6061 aluminium (6061 Al) reinforced with silicon carbide (SiC) and alumina (Al2O3) particles were investigated by means of Vickers microhardness measurements and scratch tests as mentioned in this paper.
Abstract: Particle effects on friction and wear of 6061 aluminium (6061 Al) reinforced with silicon carbide (SiC) and alumina (Al2O3) particles were investigated by means of Vickers microhardness measurements and scratch tests. Unreinforced 6061 Al matrix alloy was also studied for comparison. To explore the effect of heat treatment, materials subjected to three different heat treatment conditions, i.e. under-aged, over-aged and T6, were used. Multiplescratch tests using a diamond and a steel indentor were also carried out to simulate real abrasive wear processes. Vickers microhardness measurements indicated that T6 heattreated composites had the highest hardness. Single-scratch tests showed that the variation of friction coefficient was similar to that of Vickers hardness and the peak-aged composites exhibited the best wear resistance. The wear rate of fine particle-reinforced composites was mainly affected by hardness. However, the wear rate of large particle-reinforced composites was influenced by both the hardness and fracture of the particles.
123 citations