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Harimon, Mohd Azhar
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Effect of Fuel-to-Oxygen Ratio to Tungsten Carbide-Nickel (WC-Ni) High Velocity Oxy Fuel (HVOF) Deposition
- 2020Effect of the Heat treatment on Mechanical and Physical Properties of Direct Recycled Aluminium Alloy (AA6061)
- 2020Mechanical Behavior and Microstructural Analysis of Molybdenum-TZM Alloy Subjected to Different Annealing Temperaturecitations
- 2019Artificial Neural Network Application for Damages Classification in Fibreglass Pre-impregnated Laminated Composites (FGLC) from Ultrasonic Signalcitations
- 2019Effect of Chip Treatment on Chip-Based Billet Densification in Solid-State Recycling of New Aluminium Scrapcitations
- 2019Effect of hot extrusion parameters on microhardness and microstructure in direct recycling of aluminium chipscitations
- 2019Fatigue performance of thermal spray coatings on carbon steel: a review
- 2017High temperature fracture toughness and fatigue behavior of Ti-Zr-Mo and W-Re alloys for X-ray tube application
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article
Effect of hot extrusion parameters on microhardness and microstructure in direct recycling of aluminium chips
Abstract
Direct hot extrusion is an alternative process for recycling aluminium without melting the scrap. It utilizes low energy and is environmental friendly. This paper reports the microhardness and microstructure of aluminium alloy chips when subjected to various settings of preheating temperature and preheating time in hot extrusion process. Three values of preheating temperature are taken as 450 °C, 500 °C, and 550 °C. On the other hand, three values of preheating time were chosen (1 h, 2 h, 3 h). The influences of the process parameters (preheating temperature and time) are analyzed using design of experiments approach whereby full factorial design with center point analysis are adopted. The total runs are 11 and they comprise of two factors of full factorial design with 3 center points. The responses are microhardness and microstructure. The results show that microhardness increases with the decrease of the preheating temperature. The results also show that the preheating temperature is more important to be controlled rather than the preheating time in microhardness analyses. The profile extrudes at 450 °C and 1 hour has gained the optimum microhardness and it can be concluded that setting temperature at 550 °C for 3 hours results in the highest responses for average grain sizes in analysis of microstructure. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinhei