Conference Publications
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PublicationImprovement of Corrosion Resistance of Rare-Earth Element (REE) – Based Anodic Coating on Biodegradable Magnesium Alloy( 2021-01-01)AZ91D alloy has been widely used in fields of materials science, tissue engineering, biomedicine, and analytical science due to its simple preparation, low-cost, and high biocompatibility. To overcome their weaknesses which low corrosion resistance due to high surface reactivity. The effectiveness of the lanthanum (La) on corrosion resistance, has exhibited great potentials for improving its protective properties. AZ91D alloy has been coated with lanthanum nitrate and magnesium nitrate through anodizing at fixed concentration and treatment time, with various current density. Surface roughness, elemental compositional analysis, surface morphology analysis, and corrosion behavior were analyzed for the corrosion response at various current density. JIS H 0541 Standard was used to determine the corrosion rate of the samples. It is showed that the sample undergoing 10 mA/ cm2 current density indicated the highest corrosion resistance due to their value on corrosion rate 8.6 mm/year was the lowest value and their surface roughness 0.199 µm was in the range of recommended roughness for a biomedical implant.
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PublicationAnalysis of an assembly process and environmental impact for a new design of food grater( 2021-05-03)This research analyses and evaluate food grater components in order to reduce the required quantity and to consider the improvement of possible sustainable design based on various material selection, particularly to specific parts. This study will use integration methodology to achieving sustainability which is Design for Manufacturing Assembly (DFMA), and Life Cycle Analysis (LCA). The analysis result will show the reduction of the part numbers from 20 parts to only four parts respectively to the significant alteration for specific components. Furthermore, the Life Cycle Analysis (LCA), the weight is reduced by 12.46 gram after changing the material from PPE to ABS. Also, the carbon footprint effect reduced by 40% while air acidification effect is reduced by 21.9%. Besides the material changes also reduced the total energy consumed by 36.4%. This study found that both methods are capable of reducing production costs assembly time, and consequently can enhance the environmental impact of a product.
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PublicationOptimization of heating rate on hybrid microwave sintering of the PM Fe-Cr MMCs reinforced with Al2O3particle( 2021-07-21)This study reports the optimization of heating rate on the microwave sintered Fe-Cr-Al2O3 metal matrix composite (MMC). The heating rate was selected between 10°C/min to 60°C/min with increment of 10°C/min respectively. The samples were fabricated via PM route and microwave sintering was carried out in a tubular microwave furnace HAMiLab-V3 in N2 atmosphere purposely to avoid any oxidation and chemical reaction to samples. The microstructure of sintered samples was evaluated using SEM and bulk density and porosity were determined based on ASTM B962 - 17 and the microhardness were determined based on ASTM E384. The optimized heating rate of the sample was selected based on the micro hardness value and total porosity percentage as well as based on SEM microstructure analysis. The results revealed that the optimum heating rate occurred at 20°C/min due to the highest value of hardness achieved which is about 119.28 HV with at the highest bulk density about 6.07 g/cm3 and at the lowest total porosity about 14.55%. SEM micrographs also showed that the diffusion was mostly effective at 20°C/min heating rate compared to others, indicated that significant grain boundary diffusion of Fe matrix into Al2O3 particle was occurred.
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PublicationProduct simplification design improvement by using DFMA method DFMA analysis on measuring tape( 2021-07-21)For this project, it is focused on the improving design and analysis measuring tape. Measuring tape is not a new thing to us. It is a high demand product in surveyor industry. Currently, they are a lot of measuring tape design are selling in the market. The objectives of this project are to design the measuring tape and to decrease the time to assembly the product. Besides, it also learn on to analyse the cost of manufacturing of the product. The design of measuring tape is using CAD software and then transfer to Finite Element Analysis (FEA) to analyses the capabilities of part design. At the end of this project, this research will give understanding about design using CAD software and do analysis that improved the measuring tape.
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