Investigation of the Mechanical Behavior of Synthesized Al6061/TiO2 Microcomposites Using an Innovative Stir Casting Method

Badran, Ahmed; Alamro, Turki; Bazuhair, Rabeea W.; El-Mawla, Ahmed Ali Gad; El-Adben, S. Z.

doi:10.3390/nano12101646

Cited by 14 publications

(8 citation statements)

References 38 publications

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“…When the grain size decreased, the surface area was increased [22]. Dislocations are prevented by grain refining [23]. In addition, matrix and reinforcement have different thermal conductivities.…”

Section: Microstructures Examinationsmentioning

confidence: 99%

Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

AbdElRhiem,

Mostafa,

Nada

et al. 2023

Phys. Scr.

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This paper presents the effects of adding TiO2, CuO, and SiO2 (1 wt%) nanoparticles on the microstructure and mechanical properties of Al-10 wt% Zn alloy. A set of composite alloys was produced by incorporating SiO2, CuO, and TiO2 nanoparticles to the Al-10 wt% Zn alloy. Optical microscope (OM), scanning electron microscope (SEM) fitted with an Energy Dispersive Spectroscope (EDS), and X-ray diffraction (XRD) were used to investigate the microstructure of these alloys. The mechanical properties of the composite solders were assessed using the Vickers hardness tests. After a solution heat treatment at 500 K for 2 h, samples were immediately aged at 373 to 473 K for 2 h, followed by water quenching at 300 K. The experimental data indicated that Al-10 wt% Zn-1wt% SiO2 samples had the highest hardness values among all investigated composite alloys. The calculated porosity percentages of the composite alloys revealed that the Al-10 wt% Zn-1 wt% SiO2 samples had the lowest percentage. This finding can be attributed to the fact that these samples demonstrated the highest hardness values. The hardness of all composite alloys decreased with increasing the aging temperature with anomalous behavior at 443 K, where they had abnormally high values. The observed differences in the mean crystallite size, lattice strain, and dislocation density of the composite alloys, calculated from XRD data with increasing aging temperature, are attributed to the precipitation in Al-Zn alloys. The calculated values of the stress exponent and activation energy of composite alloys may be associated with grain boundary diffusion (GBD) as the dominant operating mechanism.

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Section: Microstructures Examinationsmentioning

confidence: 99%

Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

AbdElRhiem,

Mostafa,

Nada

et al. 2023

Phys. Scr.

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“…The uniform distribution of Ti 2 SnC particles can significantly affect the grain refinement of Cu–Ti 2 SnC composites. [ 42 ] This reduction in grain size increases the strength of the composite according to the Hall–Patch relationship, which can be calculated using the following equation [ 43 ]

Δ σ_{GR} = K false(D_{normalc}^{- 0.5} - D_{normalm}^{- 0.5} false)

where K is a constant in the order of 4.5 MPa

\sqrt{mm}

[ 44 ] for Cu; D c and D m are the average grain sizes for the composite and monolithic Cu references, respectively. According to the microstructural results, it can be stated that by increasing the rotation speed up to 600 rpm, the strengthening effect through Hall–Patch increases, and with a further increase in the rotation speed, the contribution of this mechanism decreases.…”

Section: Resultsmentioning

confidence: 99%

“…The uniform distribution of Ti 2 SnC particles can significantly affect the grain refinement of Cu-Ti 2 SnC composites. [42] This reduction in grain size increases the strength of the composite according to the Hall-Patch relationship, which can be calculated using the following equation [43] Δσ…”

Section: Resultsmentioning

confidence: 99%

Effects of Ti₂SnC MAX Phase on Microstructure, Mechanical, Electrical, and Wear Properties of Stir‐Extruded Copper Matrix Composite

et al. 2023

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Herein, the effect of Ti2SnC MAX phase reinforcement and friction stir back extrusion (FSBE) parameters on the microstructure, mechanical, electrical, and tribological behavior of Cu‐Ti2SnC composite is investigated. The results indicate that, depending on the rotational speed of the extrusion process, an equiaxed grain microstructure with a uniform distribution of reinforcing particles is formed after the extrusion process. Comparing the extruded samples to the unprocessed samples reveals a larger grain size after extrusion. The absence of MAX phase particles causes the formation of finer grain size in the extruded sample. Under the influence of heat and plastic strain, a reactive layer containing a solid solution of Cu(Sn) or Cu3Sn compounds is formed at the interface of the particle and the copper matrix. By performing the extrusion process, the reactive layer at the interface is broken and scattered on the copper matrix. Furthermore, by applying MAX phase reinforcing particles and performing the extrusion process, the copper matrix's hardness, tensile strength, and wear resistance increase by 128, 99, and 84%, respectively. The five vol% Ti2SnC MAX phases in the extruded copper matrix composite wire results in 7.3% reduction in electrical conductivity.

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“…Six cycles of turning over and remelting each alloy were used to achieve chemical homogeneity, with fast cooling applied to eliminate microscopic segregation of the as-cast materials. This developed casting technique promotes advantages compared to conventional casting techniques [ 36 , 37 ]. The processing setup until the cutting step of the castalloys is demonstrated in Figure 1 .…”

Section: Experimental Workmentioning

confidence: 99%

Effect of Si Content on the Thermal Expansion of Ti15Mo(0–2 Si) Biomaterial Alloys during Different Heating Rates

et al. 2023

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Thermal expansion measurements were used to characterize phase transformations in metastable β-Ti alloys (Ti15MoxSi) without and with various Si additions (where x = 0, 0.5, 1.0, 1.5, and 2 in wt.%) during linear heating at two heating rates of 5 and 10 °C/min up to 850 °C. For this study, five alloys were developed and examined in terms of their presence phases, microstructures, and starting and final transformation temperatures. According to the results, all of the as-cast samples primarily include an equiaxed β-Ti phase. The influence of phase transformation on the material dimensions was discussed and compared with the variations in Si contents. The transformation was investigated using a dilatometric technique for the developed alloys during continuous heating and cooling. The dilatometric curve of heating revealed two distinct reflection points as the heating temperature increased. The starting transformation temperature (Ts) to obtain the ω-phase was reported at 359 °C without Si addition; whereas the final transformation temperature (Tf) of the dissolution of α-phase was obtained at 572 °C at a heating rate of 10 °C/min. At 2 wt.% Si, the first derivative curves reported Ts and Tf transforming temperatures of 314–565 °C (at a 5 °C/min heating rate) and 270–540 °C (at a 10 °C/min heating rate), respectively. The Ts and Tf transforming temperatures were significantly decreased with Si additions, which decreased the β-transus temperature. Moreover, the thermal expansion coefficient curves of the investigated alloys without and with 2 wt.% Si were studied. The transformation heating curves have an S-shaped pattern, according to the results.

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Investigation of the Mechanical Behavior of Synthesized Al6061/TiO2 Microcomposites Using an Innovative Stir Casting Method

Cited by 14 publications

References 38 publications

Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of Ti₂SnC MAX Phase on Microstructure, Mechanical, Electrical, and Wear Properties of Stir‐Extruded Copper Matrix Composite

Effect of Si Content on the Thermal Expansion of Ti15Mo(0–2 Si) Biomaterial Alloys during Different Heating Rates

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Investigation of the Mechanical Behavior of Synthesized Al6061/TiO2 Microcomposites Using an Innovative Stir Casting Method

Cited by 14 publications

References 38 publications

Effects of TiO2, CuO, and SiO2 nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of TiO2, CuO, and SiO2 nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of Ti2SnC MAX Phase on Microstructure, Mechanical, Electrical, and Wear Properties of Stir‐Extruded Copper Matrix Composite

Effect of Si Content on the Thermal Expansion of Ti15Mo(0–2 Si) Biomaterial Alloys during Different Heating Rates

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Product

Resources

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Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of TiO₂, CuO, and SiO₂ nanoparticles addition on the microstructure and mechanical properties of Al-10 wt% Zn alloy

Effects of Ti₂SnC MAX Phase on Microstructure, Mechanical, Electrical, and Wear Properties of Stir‐Extruded Copper Matrix Composite