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Dhokey N.B.,College of Engineering, Pune | Athavale V.A.,College of Engineering, Pune | Narkhede N.,Aluminium Sintered Products Pvt. Ltd. | Kamble M.,Aluminium Sintered Products Pvt. Ltd.
Advanced Materials Letters | Year: 2013

Aluminium powder metallurgy is attracting attention of many researchers for making near net shape components by replacing conventional process of liquid metallurgy. In the present work, sintering response of a 2xxx series aluminium powder premix, containing 4.5Cu-1Si-0.8Mg (by wt %) blended without any lubricant in a mixer with a ball to powder ratio of 10:1 (by wt) has been studied. The higher mixing time of 6 hours and compacting pressure of 450 MPa gave 90% theoretical sintered density and hardness of 91 HRH with uniform distribution of alloying elements and optimal dimensional growth. © 2013 VBRI press. Source


Dhokey N.B.,College of Engineering, Pune | Athavale V.A.,College of Engineering, Pune | Narkhede N.,Aluminium Sintered Products Pvt. Ltd. | Kamble M.,Aluminium Sintered Products Pvt. Ltd.
Advanced Materials Letters | Year: 2013

Aluminium powder metallurgy (Al-PM) alloys are finding promising applications in many areas such as household appliances, automotive vehicles and many other allied sections where reduction in weight is the primary constraint. In the proposed research, two binary alloy systems Al-X were studied by mixing elemental powders of Aluminium (Al), Tin (Sn) and Magnesium (Mg). Two types of mixing techniques were followed. In one case, elemental powders were blended in a mechanical mixer without any mixing media (A) and another case powders were blended with ball to powder ratio of 10:1 (B). The content in binary premix was varied from 0.4 to 0.8 % Sn (by wt.) and 0.5 to 2 % Mg (by wt.) with base of Aluminium. The blended powders was compacted at 450 MPa followed by sintering in ultra high purity nitrogen atmosphere in tubular sintering furnace at 600°C. The mixing technique B showed significant influence on increase in hardness by two- fold and reduction in dimensional growth. © 2013 VBRI press. Source

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