Wear Properties of A356/Al2O3 Metal Matrix Composites Produced by Semisolid Processing

Alhawari, K. S.; Omar, Mohd Zaidi; Ghazali, Mariyam Jameelah; Salleh, Mohd Shukor; Mohammed, M. N.

doi:10.1016/j.proeng.2013.12.166

Cited by 44 publications

(25 citation statements)

References 11 publications

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“…In addition, a delamination was found in the microstructure of the worn surface. It illustrates that the dominant wear mechanism was a combination of adhesion and delamination mechanisms, similar to the findings of Alhawari [46]. …”

Section: Influence Of T6 Heat Treatment On Mechanical Propertiessupporting

confidence: 82%

“…Furthermore, wear resistance of the rheoformed composite components increased when volume fraction of Al2O3 nanoparticles increased from 1% to 7%. The research of Alhawari et al [46] also showed that wear resistance of the composite part formed via semisolid processing was higher than that of the composite part via conventional stirring casting. When volume fraction of Al2O3 nanoparticles reached 10%, wear rate of the rheoformed composite Al 2 CuMg phase besides Al phase, Al 2 Cu phase, and Al 2 O 3 nanoparticles was also detected in the XRD pattern of the rheoformed composite components with T6.…”

Section: Influence Of T6 Heat Treatment On Mechanical Propertiesmentioning

confidence: 99%

“…Furthermore, wear resistance of the rheoformed composite components increased when volume fraction of Al 2 O 3 nanoparticles increased from 1% to 7%. The research of Alhawari et al [46] also showed that wear resistance of the composite part formed via semisolid processing was higher than that of the composite part via conventional stirring casting. The specimens subjected to wear test have been examined via SEM (Figure 21).…”

Section: Influence Of T6 Heat Treatment On Mechanical Propertiesmentioning

confidence: 99%

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Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Jiang

Xiao

Che

et al. 2018

Metals

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Abstract:The 2024 nanocomposite reinforced with Al 2 O 3 nanoparticles was fabricated by the ultrasonic assisted semisolid stirring (UASS) method and rheoformed into a cylinder component. Microstructure, mechanical properties, and wear behavior of the rheoformed composite components were investigated. The results showed that the composite components with complete filling status and a good surface were rheoformed successfully. The deformation of semisolid slurries was mainly dominated by flow of liquid incorporating solid grains (FLS), sliding between solid grains (SSG), and plastic deformation of solid grains (PDS). Mechanical properties of the rheoformed composite components were influenced by stirring temperature, stirring time, and volume fraction of Al 2 O 3 nanoparticles. The optimal ultimate tensile strength (UTS) of 358 MPa and YS of 245 MPa were obtained at the bottom of the rheoformed composite components after a 25-min stirring of composite semisolid slurry with 5% Al 2 O 3 nanoparticles at 620 • C. Enhancement of mechanical properties was attributed to high density dislocations and dislocation tangles and uniform dispersed Al 2 O 3 nanoparticles in the aluminum matrix. Natural ageing led to the occurrence of needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. UTS of 417 MPa and YS of 328 MPa of the rheoformed composite components were achieved after T6 heat treatment. Improvement of mechanical properties is due to the more precipitated needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. Wear resistance of the rheoformed composite components was higher than that of the rheoformed matrix component. Wear resistance of the rheoformed composite component increased with an increase in Al 2 O 3 nanoparticles from 1% to 7%. A slight decrease in wear rate resulted from 10% Al 2 O 3 nanoparticles due to greater agglomeration of Al 2 O 3 nanoparticles. A combination mechanism of adhesion and delamination was determined according to worn surface morphology.

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Section: Influence Of T6 Heat Treatment On Mechanical Propertiessupporting

confidence: 82%

Section: Influence Of T6 Heat Treatment On Mechanical Propertiesmentioning

confidence: 99%

“…Furthermore, wear resistance of the rheoformed composite components increased when volume fraction of Al 2 O 3 nanoparticles increased from 1% to 7%. The research of Alhawari et al [46] also showed that wear resistance of the composite part formed via semisolid processing was higher than that of the composite part via conventional stirring casting. The specimens subjected to wear test have been examined via SEM (Figure 21).…”

Section: Influence Of T6 Heat Treatment On Mechanical Propertiesmentioning

confidence: 99%

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Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Jiang

Xiao

Che

et al. 2018

Metals

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“…Mg2Si compounds have excellent mechanical properties, a high melting temperature (1085 o C), low density (1.99 g/cm 3 ), low coefficient of thermal expansion (7.5×10 -6 K -1 ), high hardness, and high elastic modulus (120 GPa). The addition of 1 wt%, 2.5 wt%, and 5 wt% Al2O3 to aluminum A356 can increase the hardness from 62 BHN to 68 BHN and decrease the wear rate of the composite (Alhawari et al, 2013). Figure 4b shows the wear rate of A356/Al2O3 composite with different variations of grain refiner TiB.…”

Section: Mechanical Properties Of A356/al2o3 Compositementioning

confidence: 99%

The Mechanical Properties of Al2O3-Reinforced Aluminum A356 with Grain Refiner Al-5Ti-1B Fabricated using the Stir Casting Method

Dhaneswara¹,

Verdiyanto²,

Syahrial³

2017

IJTech

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Al2O3 reinforced aluminum A356 has been successfully fabricated using the stir casting method. The development of current technology requires a material that is light, strong, tough, and corrosion and wear resistant, in addition to various other advanced properties. A composite material was therefore developed. Composite materials can be used in a wide range of strategic sectors such as the automotive, military, aerospace, and electrical industries. This study aims to develop a composite material that consists of aluminum A356 as the matrix and micro Al2O3 as the reinforcement, with 8 wt% magnesium as the wetting agent with the addition of grain refiner TiB at 0; 0.01; 0.0347; 0.0362; 0.0622; and 0.0689 wt% using the stir casting method. The material characterization comprises tensile testing, hardness testing, wear testing, chemical composition testing (OES and XRD), and microstructure testing (OM, SEM, and EDX). The test results revealed that the addition of 0.0347 wt% TiB was capable of reducing the size and changing the shape of a long and coarse grain to become round and fine, thereby significantly increasing its tensile strength, hardness, and wear resistance, but decreasing the elongation and ductility.

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“…The thixojoining process is developed on the basis of semi-solid metal (SSM) processing, which takes place when the material is between solidus and liquidus temperatures, i.e. when the material shows thixotropic behaviour (Mohammed et al 2012& Alhawari et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Properties of Semisolid Welded Joints for AISI D2 Tool Steel

Mohammed¹,

Omar²,

Syarif³

et al. 2014

JKUKM

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Wear Properties of A356/Al2O3 Metal Matrix Composites Produced by Semisolid Processing

Cited by 44 publications

References 11 publications

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

The Mechanical Properties of Al2O3-Reinforced Aluminum A356 with Grain Refiner Al-5Ti-1B Fabricated using the Stir Casting Method

Microstructural Properties of Semisolid Welded Joints for AISI D2 Tool Steel

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