A Study of Microstructure and Tribological Properties of Stir Cast Al Metal Matrix Composite

Prasad, V. Jaya; Rao, N. Mohan; Kamaluddin, Syed

doi:10.1016/j.matpr.2017.07.286

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Metal matrix composites (MMCs) are composed of two or more materials and customized performance can be obtained. Particle-reinforced MMCs have attracted plenty of attentions due to their excellent mechanical properties [ 1 ]. Among those MMCs produced in recent years, aluminum matrix composites (AMCs) have received much attention.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Microstructure and Mechanical Properties of CNTs-AlSi10Mg Composites Fabricated by Selective Laser Melting

Luo

et al. 2021

Materials

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CNT-AlSi10Mg composites fabricated by SLM have drawn a lot attention in structural application due to its excellent strength, elasticity and thermal conductivities. A planetary ball milling method was used to prepare the carbon nanotube (CNT)-AlSi10Mg powders, and the CNT-AlSi10Mg composites were fabricated by selective laser melting (SLM). The density, microstructure and mechanical properties of CNT-AlSi10Mg composites were studied. The density of the test samples increased at first and then decreased with increasing scan speed. When the laser scan speed was 800 mm/s, the test sample exhibited the highest density. The hardness increased by approximately 26%, and the tensile strength increased by approximately 13% compared to those values exhibited by the unreinforced AlSi10Mg. The grains of CNT-AlSi10Mg composite are finer than that in the AlSi10Mg. The CNTs were distributed along the grain boundaries of AlSi10Mg. Some of the CNTs reacted with Al element and transformed into Al4C3 during SLM, while some of the CNTs still maintained their tubular structure. The combination of CNTs and Al4C3 has a significant improvement in mechanical properties of the composites through fine grain strengthening, second phase strengthening, and load transfer strengthening.

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Section: Introductionmentioning

confidence: 99%

“…Among those MMCs produced in recent years, aluminum matrix composites (AMCs) have received much attention. Lots of AMCs have been investigated with different phases: Al 2 O 3 nanoparticles [ 2 ], SiC nanoparticles [ 1 ], TiC nanoparticles [ 3 ], and TiB 2 nanoparticles [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Microstructure and Mechanical Properties of CNTs-AlSi10Mg Composites Fabricated by Selective Laser Melting

Luo

et al. 2021

Materials

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“…On the other hand, liquid-state processes are known to be inexpensive and easy, with excellent productivity. However, liquid metal processes such as stir-casting (SC) make it difficult to ensure the uniform dispersion of ceramic particles in the matrix due to poor wettability and density differences [10][11][12][13][14][15]. Aykut Canakci et al [16] investigated the mechanical properties of composites fabricated by SC.…”

Section: Introductionmentioning

confidence: 99%

Dispersion Mechanism and Mechanical Properties of SiC Reinforcement in Aluminum Matrix Composite through Stir- and Die-Casting Processes

Shin

Park

et al. 2021

Applied Sciences

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In this study, different volume fractions of silicon-carbide-reinforced AA2024 matrix composites were successfully fabricated using stir-casting (SC) and die-casting (DC) processes. The microstructural difference and physical properties of the composites during the manufacturing process were investigated in detail. The microstructural analysis found that the composite produced by the SC process had some reinforcement clusters and pores; however, defects and clusters significantly decreased after the DC process. In particular, the degree of reinforcement dispersion was quantitatively analyzed and compared before and after the DC process using the dispersion-analysis method. As a result of quantitative evaluation, the degree of dispersion was improved 2.5, 4.6, and 4.0 times with 3 vol.%, 6 vol.%, and 9 vol.% SiC-reinforced composite after the DC process, respectively. The electron backscatter diffraction (EBSD) analysis showed that the grain size of the 9 vol.% SiC-reinforced DC composite (17.67 μm) was 75% smaller than that of the SC composite (68.06 μm). The average tensile strength and hardness of the 9 vol.% SiC-reinforced DC composite were 2 times higher than those of the AA2024 matrix. The superior mechanical properties of the DC-processed composite can be attributed to the increase in dispersivity of the SiC particles and to decreases in defects and grain size during the DC process.

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“…Brass shows the high wear rate when compared with steel and aluminum for same test conditions (Ajay et al, 2018). Hardness of the aluminum metal matrix composites was increased from 62.4 HV to 73.5 HV when compared with base composite material (Jaya Prasad et al, 2017). A small particle size leads to inferior high-speed wear resistance at low load in Al/SiC composites (Kwok et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of contact temperature, normal load and dry sliding velocity on the coefficient of friction and wear behavior of nickel based super alloy

Krishna¹,

Lokanadham²

2021

WJE

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Purpose The purpose of the present paper aims to, study the coefficient of friction and wear behavior of nickel based super alloys used in manufacturing of gas and steam turbine blades. In present paper, parametric study focuses on normal load, dry sliding velocity and contact temperature influence on coefficient of friction and wear of a nickel based super alloy material. Design/methodology/approach Experimental investigation is carried out to know the effect of varying load at constant sliding velocity and varying sliding velocity at constant load on coefficient of friction and wear behavior of nickel based super alloy material. The experiments are carried out on a nickel based super alloy material using pin on disk apparatus by load ranging from 30 N to 90 N and sliding velocity from 1.34 m/s to 2.67 m/s. The contact temperature between pin and disk is measured using K-type thermocouple for all test conditions to know effect of contact temperature on coefficient of friction and wear behavior of nickel based super alloy material. Analytical calculations are carried out to find wear rate and wear coefficient of the test specimen and are compared with experimental results for validation of experimental setup. Regression equations are generated from experimental results to estimate coefficient of friction and wear in the range of test conditions. Findings From the experimental results, it is observed that by increasing the normal load or sliding velocity, the contact temperature between the pin and disk increases, the coefficient of friction decreases and wear increases. Analysis of variance (ANOVA) is used to study the influence of individual parameters like normal load, dry sliding speed and sliding distance on the coefficient of friction and wear of nickel based super alloy material. Originality/value This is the first time to study effect of contact temperature on the coefficient of friction and wear behavior of nickel-based super alloy used for gas and steam turbine blades. Separate regression equations have been developed to determine the coefficient of friction and wear for the entire range of speed of gas turbine blades made of nickel based super alloy. The regression equations are also validated against experimental results.

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A Study of Microstructure and Tribological Properties of Stir Cast Al Metal Matrix Composite

Cited by 11 publications

References 7 publications

Investigation on the Microstructure and Mechanical Properties of CNTs-AlSi10Mg Composites Fabricated by Selective Laser Melting

Investigation on the Microstructure and Mechanical Properties of CNTs-AlSi10Mg Composites Fabricated by Selective Laser Melting

Dispersion Mechanism and Mechanical Properties of SiC Reinforcement in Aluminum Matrix Composite through Stir- and Die-Casting Processes

Effect of contact temperature, normal load and dry sliding velocity on the coefficient of friction and wear behavior of nickel based super alloy

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