Influence of calcium hexaboride reinforced magnesium composite for the mechanical and tribological behviour

Seenuvasaperumal, P.; Elayaperumal, A.; Jayavel, R.

doi:10.1016/j.triboint.2017.02.042

Cited by 51 publications

(26 citation statements)

References 35 publications

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“…These values refer to prism basal and pyramidal planes of HCP Mg crystal. Similar observation was discussed by the authors [26][27][28][29][30]. With increase in TiO 2 content in pure Mg, prism plane of Mg crystal retains at 2θ=32°, whereas the basal and pyramidal planes of Mg crystals diminished.…”

Section: X-ray Diffraction Analysissupporting

confidence: 85%

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Elumalai

Ganesh²

2020

Mater. Res. Express

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In the present work, magnesium matrix composite reinforced with titanium dioxide (TiO 2 ) nanoparticulates was synthesized using powder metallurgy (solid-state processing) technique followed by hybrid microwave heat treatment and hot extrusion. Commercially available magnesium particulates of average particle size 60-300 μm and titanium oxide nanoparticulates of average particle size ∼21 nm was used in this study. Extruded samples of pure magnesium and magnesium titanium dioxide (Mg-TiO 2 ) nanocomposites were characterized for their physical, surface and internal microstructure (2D & 3D), elemental composition and mechanical behaviour. The experimental density and porosity of the composite specimens increases gradually with increase in addition of TiO 2 . Scanning electron micrographs (SEM) composite samples revealed that the nano TiO 2 particulates distributed uniformly throughout the matrix with no significant agglomeration. The same was confirmed through 3D internal microstructure also. The elemental composition, crystalline structure was measured using x-ray diffractograms (XRD) which confirm that no foreign elements exists. Further, the microhardness and nanoindentation of composite samples showed an increasing trend with increase in addition of TiO 2 nanoparticles.

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Section: X-ray Diffraction Analysissupporting

confidence: 85%

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Elumalai

Ganesh²

2020

Mater. Res. Express

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“…The high intensified UST promoted degassing effect in magnesium melt during the casting which further reduced the porosity [7]. Moreover, the squeeze pressure imposed during the freezing process caused a substantial reduction in the microporosity in the composites [36].…”

Section: Resultsmentioning

confidence: 99%

“…For UST assisted composites the SEM micrographs (figures 9(b)-(d)), show the presence of more micro dimples which indicates the prominence of ductile deformation [21,22]. The reduction in dimple size and improvement in ductility can be due to applied squeeze pressure during the solidification of the composites in addition to UST [36].…”

Section: Tensile Propertiesmentioning

confidence: 94%

“…Also, refined grain structure caused a restriction on crack formation and propagation during tensile loading [14,27]. Thus, the refinement in grain structure and reduction in porosity due to UST and applied squeeze pressure effectively enhanced the tensile properties of the composites [23,36].…”

Section: Tensile Propertiesmentioning

confidence: 99%

“…The SEM images of fractured surfaces indicate the occurrence of both brittle and ductile fracture. Straight-line structure present in the morphology of surface is an indication of basal plane slip of magnesium matrix and hence the mode of fracture is brittle [36]. Micro dimples due to the activated non-basal slip system indicate the ductile fracture behaviour of composites.…”

Section: Tensile Propertiesmentioning

confidence: 99%

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Influence of ultrasonication power on grain refinement, mechanical properties and wear behaviour of AZ91D/nano-Al₂O₃ composites

Gnanavelbabu

Surendran

Kumar

2020

Mater. Res. Express

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In this study, magnesium alloy (AZ91D) matrix composites reinforced with 1 wt% of nano alumina (n-Al 2 O 3 ) were fabricated using novel Ultrasonic Treatment (UST)assisted squeeze casting method. UST was carried out at four different levels of ultrasonic power namely, 0 W (without UST), 1500 W, 2000 W and 2500 W at constant frequency and time. The composites were heat-treated at T6 condition under argon gas protected environment. Microstructural analysis was done using optical microscopy and high-resolution scanning electron microscopy. Physical, mechanical and tribological properties of the composites were evaluated. A significant refinement in grain structure and improvement in porosity was seen on an increase in UST power. Improvement was seen in microhardness, yield strength, ultimate tensile strength and % of elongation of the composite fabricated at 2500 W by 18%, 48%, 28%, and 10% respectively compared to an untreated composite. The composite fabricated at 2500 W showed less wear rate and coefficient of friction when compared to other composites at all sliding conditions. Scanning electron microscope images of the worn surface of the composite pins revealed that the wear mechanisms dominated were abrasion, adhesion, oxidation and delamination.

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Investigating the wear performance of AZ91D magnesium composites with ZnO, MnO, and TiO2 nanoparticles

Gnanavelbabu,

Vinothkumar,

Ross

et al. 2023

Int J Adv Manuf Technol

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In recent decades, there has been a notable advancement in the field of bioactive, biodegradable, and biocompatible metallic materials, particularly for applications in general surgery. Among these materials, magnesium alloy-based composites have gained popularity due to their excellent biological properties and adequate strength. However, their resistance to wear is still an area that requires further investigation. Therefore, this study examines the wear properties of stir-ultrasonic-squeeze-casted magnesium (AZ91D) composites, incorporating distinct nanoparticles such as ZnO, MnO, and TiO2. The Evaluation-based Distance from Average Solution (EDAS) approach is used to determine the optimal parameters. Additionally, an Analysis of Variance (ANOVA) is conducted to identify the crucial factors influencing the responses. The effect of process factors on the wear rate and Coefficient of Friction (COF) is then investigated using response surface plots. The confirmation assessments reveal that the optimal parameter conditions for the tribo process comprise a 50.0018 N applied load, a 1.4998 m/s sliding velocity, and the AZ91D + 1% TiO2 (ATO) composite utilization. The ANOVA findings demonstrate that the applied load significantly contributes to 67.3% of the wear performance. Subsequently, after determining the optimal condition, it is observed that the ATO composite, when exposed to temperatures above 150 °C, exhibits an abrupt increase in wear rate and COF due to the degradation of grain strength and the dissolution of the β-phase within the composite.

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Influence of calcium hexaboride reinforced magnesium composite for the mechanical and tribological behviour

Cited by 51 publications

References 35 publications

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Influence of ultrasonication power on grain refinement, mechanical properties and wear behaviour of AZ91D/nano-Al₂O₃ composites

Investigating the wear performance of AZ91D magnesium composites with ZnO, MnO, and TiO2 nanoparticles

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Influence of calcium hexaboride reinforced magnesium composite for the mechanical and tribological behviour

Cited by 51 publications

References 35 publications

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Influence of ultrasonication power on grain refinement, mechanical properties and wear behaviour of AZ91D/nano-Al2O3 composites

Investigating the wear performance of AZ91D magnesium composites with ZnO, MnO, and TiO2 nanoparticles

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Influence of ultrasonication power on grain refinement, mechanical properties and wear behaviour of AZ91D/nano-Al₂O₃ composites