A Study on Micro-structure, Hardness and Optimization of Wear Characteristics of Al6061/TiB2/CeO2 Hotrolled MMCs using Taguchi Method

Iyengar, S. R. Sreenivasa; Sethuramu, D.; Ravikumar, M.

doi:10.3221/igf-esis.65.12

Cited by 2 publications

(2 citation statements)

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“…10 shows a major effect graph that centers on Ra values with the goal of identifying the ideal machining parameters that lead to the best possible surface quality. The graph clearly shows that the most advantageous points in this study, which correlate with improved surface texture of composites, are: level-1 of nano-B 4 C, level-1 of nano-Al 2 O 3 , and level-3 of ageing temperature [12]. It was shown that as the ageing temperature increased, Ra decreased.…”

Section: Cutting Force and Ramentioning

confidence: 59%

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The Impact of nanoparticles (B4C-Al2O3) on mechanical, wear, fracture behavior and machining properties of formwork grade Al7075 composites

Prakash,

Gangadharappa,

Somashekar

et al. 2024

Frattura Ed Integrità Strutturale

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This study explores how ageing temperature and the volume percentage of Al2O3+B4C nanoparticles influence the machinability and hardness of stir-cast Al-7075 Metal Matrix Composite (MMC). Using liquid metallurgy techniques, hybrid materials were created by reinforcing Al7075 metal matrix with varying weight percentages of nanosized B4C (1.5%, 3%, and 4.5%) and Al2O3 (1%, 1.5%, and 2%). After fabrication, the samples were subjected to five-hour ageing process at temperatures of 100, 120, and 140 degrees Celsius, followed by cooling to ambient temperature (27 degrees Celsius). Hybrid nano composites that had been heat treated were tested for wear, tensile strength, and hardness. Results shows that, the addition of nanoparticles and heat treatment considerably improves the tensile strength, hardness, and wear resistance of hybrid composites by 3%, 17%, and 10%, respectively, for samples reinforced with 4.5% B4C + 2% Al2O3. SEM analysis was used to investigate the type of wear and the tensile fracture mode of nano composite samples by analyzing the wornout surface and the surface where tensile fracture occurred. Machinability was assessed using L27 orthogonal array tests, focusing on three key process parameters: feed rate (0.1 mm/min), depth of cut (0.2 mm/min), and spindle speed (1000 rpm). Outcomes show that, increasing the wt. % of nano-Al2O3/B4C leads to higher machining force and surface roughness (Ra) of MMCs. Conversely, higher ageing temperatures result in decreased machining force and surface roughness. Optimal surface roughness and machining force were achieved with 1% Al2O3 + 1.5% B4C and an ageing temperature of 140°C. These findings offer valuable insights into the ease of machining of composite metal alloys, emphasizing the importance of parameter selection and optimization for desired machining outcomes.

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Section: Cutting Force and Ramentioning

confidence: 59%

“…In the current study, the primary reason for the MMCs' reduced ductility was interface debonding. Furthermore, the primary factor causing the quick failure of MMCs is the presence of nano-sized B 4 C/Al 2 O 3 particle clusters, which likewise have no effect on the tensile strength of MMCs at increasing weight percentages of nano reinforcements[11,12].…”

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confidence: 99%