Effect of Flyash Addition on the Quality of Al-11%Si Alloy Castings Produced by V-Process

Abstract

Energy is important for modern civilization and the electrical power from thermal stations is a major source of energy on which hinges the functioning and growth of mankind. In almost all major countries of the world thermal power stations are getting bigger and are generating huge quantities of flyash as a waste from their mammoth boilers. Despite extensive research on flyash, its utilization level is still low although it is considered as a novel and useful material in various fields such as building and road construction, agriculture, refractory works, water treatment, foundry, etc. In the present work flyash has been used as an additive to the silica sand in the V-process molds and its effects on the surface finish and total solidification time of the Al-11%Si alloy castings have been studied. Results indicate that the surface finish of the castings improves by the addition of flyash. Total solidification time of the castings reduces when the flyash has been added beyond 25 percent.

Mathematical Modelling for Surface Hardness in Vacuum Moulding of Al-Al₂O₃ MMC

“…On the basis of this model, Singh and Singh (2011) studied the relationships between SH and controllable process parameters [14]. These relationships agree well with the trends observed by experimental observations made otherwise [8][9][10][11][12][13].…”

“…The process uses a specially designed, strong, highly flexible polymer film to seal the open ends of the sand mould and form the mould cavity [8]. The literature review reveals that lot of work has been reported on optimization of VM process [9][10][11][12][13]. Various process parameters like: vibration frequency, pouring temperature and plastic film thickness for the sound casting produced by VM process have been reported.…”

Application of Taguchi Method for Determining Optimum Surface Roughness in Wire Electric Discharge Machining of P/M Cold Worked Tool Steel (Vanadis-4E)

“…The estimated mean of the response characteristic surface roughness can be determined (Kumar, 1993 andRoy, 1990) The 95% confidence interval of the population is:…”

Investigations of Al–SiC AMC prepared by vacuum moulding assisted stir casting

“…The literature review reveals that some research work has been reported on AMC development using vacuum moulding and stir casting process [17][18][19][20]22,[25][26][27]. But hitherto no work has been reported on the wear properties of AMC prepared with different particle size of solutes (i.e.…”

“…Moulding equipment is simple too [19][20][21]. In this process sand thermal conductivity is lower and metal fluidity is improved [22]. Stir casting involves introduction of reinforcement/abrasive particles into metal melt by stirring powders [23][24][25].…”