Review on synthesis of AA 6061 metal matrix alloy using stir casting method

Nandal, Rajesh; Jakhar, Amman; Duhan, Raj Kumar

doi:10.1016/j.matpr.2022.10.268

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…The stir casting technique enables the homogeneous distribution of reinforcement inside the base material, while also dispersing any agglomerations and minimizing the presence of crack-like flows. These factors have a significant impact on the physical and mechanical properties of the resulting composites, [5][6][7][8][9][10][11][12][13][14][15]. In a work conducted with Tashtoush et al, [16], it was shown that the hardness of Al/Gr composites reduced as the percentage of Gr reinforcement heightened.…”

Section: Introductionmentioning

confidence: 99%

MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF STIR-CASTING Al2O3-SiC-Gr/Al6063 HYBRID COMPOSITE

Hewidy,

Sabry

2024

Journal of the Egyptian Society of Tribology

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The mechanical characteristics of composite materials play a crucial role in advancing technology. The present investigation employed the stir-casting method to produce hybrid aluminum matrix composites. Silicon carbide and aluminum oxide were selected as reinforcements in order to improve mechanical performance. Aluminum matrix composites (AMCs) were synthesized through the implementation of the stir-casting technique, incorporating varying volume percentages of aluminum oxide (10%, 15%, and 20%) with a consistent volume fraction of silicon carbide (15%) ang 10% graphite(G). The constructed AMCs were subjected to testing in order to evaluate their tensile strength (UTS), hardness (VHN), and wear rate (WR%). The wear rate was quantified across weights (10 N, 15 N, 20 N, and 25 N) and sliding velocities (0.3 m/s, 0.6 m/s, 0.9 m/s, and 1.3 m/s). In this study, a comparison was made between the mechanical characteristics of the manufactured aluminium matrix composites (AMCs) and those of the Al6063 alloy. The work outcomes indicated that the incorporation of silicon carbide and aluminium oxide resulted in a critical reinforcement of both the tensile strength and hardness properties. The tensile strength exhibited a notable rise, rising from an initial value of 590 MPa to a final value of 900 MPa. Similarly, the hardness of the material experienced an upward trend, ascending from an initial measurement of 70VHN to a final measurement of 90VHN. The wear rate exhibited a positive correlation with the magnitude of the applied load. Nevertheless, the variation in sliding velocity yielded distinct consequences. The velocity exhibited a quick increase until it attained a peak value of 0.9 m/s, then undergoing a sharp decline. KEYWORDS Aluminium matrix composites, aluminium oxide, and silicon carbide reinforcement, stir casting, wear testing.

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Section: Introductionmentioning

confidence: 99%

MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF STIR-CASTING Al2O3-SiC-Gr/Al6063 HYBRID COMPOSITE

Hewidy,

Sabry

2024

Journal of the Egyptian Society of Tribology

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“…The preparation of this material generally includes stir casting, in situ synthesis, extrusion casting, powder metallurgy, etc. [ 5 , 6 , 7 , 8 , 9 ]. Of these, powder metallurgy is an excellent composite preparation technology, offering flexible selection of reinforcement phase, precise and controllable content, strong designability, and reduced brittleness in the particle/matrix.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Micron-Sized TiB2 Particles on the Properties of Al6061 Strengthened with 4% TiB2 Nano-TiB2

Zheng,

Long,

Zhu

et al. 2023

Materials

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Dual-scale (nano and micron) particle-reinforced TiB2/6061Al matrix composites with different contents of TiB2 were prepared using powder metallurgy, and then analyzed via microstructure observation and tests of microhardness, tensile properties, and friction and wear properties. The 6061Al powders’ particles changed from spherical to flaky after two rounds of high-energy ball milling, and the TiB2 enhancer was embedded in or wrapped by the matrix particles after high-energy ball milling. Metallurgical bonding between TiB2 particles and the matrix was achieved, and Al3Ti was synthesized in situ during sintering. The hot-pressing process eliminated the internal defects of the composites, and the TiB2 particles were diffusely distributed in the matrix. The best comprehensive mechanical properties (hardness and tensile strength) were achieved when the mass fraction of TiB2 was 5% (1% micron + 4% nano); the hardness and tensile strength of the composites reached 131 HV and 221 MPa—79.5% and 93.9% higher than those of the pure matrix, respectively. The composites’ average coefficient of friction and volumetric wear rate were reduced. Composites with a TiB2 mass fraction of 7% (3% micron + 4% nano) had the highest average coefficients of friction and the lowest volumetric wear rate of 0.402 and 0.216 mm3∙N−1∙m−1, respectively. It was observed that adhesion influences the friction mechanism, which transitions from adhesive wear with slight oxidative wear to abrasive wear.

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