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Technical Paper

Structure and Behaviour Characteristics of Aluminum –Nickel- Zinc Alloy by Spray Forming

2024-02-23
2023-01-5120
The microstructure of the alloy and the manner in which it responds to heat treatment has been investigated. The alloy was aged at 550OC when it was initially spray-formed, or when its thickness was decreased by 38%. Before further aging of some specimens, a four-hour solution treatment at 1015OC was performed. The subsequent phase was a cold deformation that was barely 60% of the sample's initial thickness. The alloys' electrical conductivity and hardness may be evaluated based on how long they had been created. Following solution treatment and cold rolling, the alloy's peak hardness was around 380 kgf/mm2. In samples aged immediately under spray-produced conditions, the maximum peak hardness of 255 kgf/mm2 was attained. Conductivities in freshly cold-rolled samples could reach up to 75% of the standard for annealed copper internationally. It looks at the microstructural features of this alloy in this context, paying close attention to how various processing conditions affect them.
Technical Paper

Evolution of A356 with Flyash Composites on Metallurgical Mechanical and Tribological Behaviour under Dry and Wet Conditions

2021-10-01
2021-28-0272
Among all metal matrix composites, A356 is the most applicable matrix due to its low density and exhibits nominal strength with soft nature. This proposed study is concerned with the examination of mechanical and tribological behavior of virgin A356 alloy and A356 reinforced with 10wt.% power plant waste flyash particles composites were processed by liquid metallurgy stir cum squeeze casting technique. The fabricated composites expose enhanced higher hardness when compared to the virgin A356 alloy due to the presence of flyash particles in the matrix. The wear and friction behavior of casted samples were evaluated with a pin on disk tribometer apparatus under dry and wet sliding environment at the presence of lubricant (SAE 80W-90) by varying sliding load of 10N-40N and sliding velocity of 1-3 m/s respectively. Wear rate increase with the increasing load and sliding velocity.
Technical Paper

Evaluation of Tribological Behaviour of Stir Casted Aluminium Alloy Hybrid Composites

2024-02-23
2023-01-5171
Employing the stir casting process, a unique hybrid composites were fabricated, using A356 as the matrix and reinforced with ZrSiO4 and TiB2 particulates. The produced specimens were initially in their as-cast state. Following that, the reinforcement particle concentrations were changed 2 and 4 weight percentages (wt%) of ZrSiO4 and keeping a constant 6 wt% of TiB2. Three samples were exposed to dry sliding conditions at room temperature using a tribometer. Two applied loads of magnitude 10N and 50N and a sliding velocity of 1m/s and 2m/s were selected as testing parameters. After measuring the wear rate (WR) and the coefficient of friction (COF), the worn-out pin surfaces were examined using scanning electron microscopy (SEM).
Technical Paper

Deformation of 8561 Aluminium Alloy during Mechanical Stir Processing at Higher Temperature

2024-02-23
2023-01-5160
The current research examines the structural and mechanical properties of sheets made from the 8561 aluminum alloy using the dynamic stir procedure. After being treated perpendicular to the direction of rolling, the compressive material characteristics of the strips were investigated at room temperature in the longitudinal and vertical dimensions relative to the treatment orientation. Tensile tests at the grain boundary were also performed at relatively high temperatures and different strain rates to assess the ductile mechanical properties of the crystallization substance and to ensure the distinctions from the parent material caused by the dynamic stir process. Tensile testing at temperatures and strain rates ranging from 380 °C to 780 °C was employed in parallel studies of the material's behavior at high temperatures. Electron microscopy was used to examine the fracture surfaces of specimens evaluated at various temperatures.
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