Abstract
Present research work analyses the effect of heating modes on the densification, microstructure and mechanical properties of aluminum alloys [65Al-20Cu-15Mn] fabricated through powder metallurgy route. Sintering of compacts using conventional, microwave and spark plasma sintering methods has been carried out at 525°C. From the results, it has been observed that the spark plasma sintering method produced the samples with better mechanical properties than the other two methods, followed by microwave and conventionally sintered counterparts. Microstructural analysis using optical microscopy revealed that spark plasma sintered sample has finest microstructure due to faster rate of heating than microwave and conventional methods.
Highlights
Aluminum (Al) was selected in this study due to its distinctive characteristics, such as low density (2.7 g/cm3) and combination of moderate strength, and high ductility, thermal conductivity, electric conductivity, corrosion-resistance[1]
Later on many researchers have reported microwave sintering of many compacts fabricated through powder metallurgy and alloyed compositions to nearly full density with improved mechanical properties[9,10,11,12,13,14,15,16,17,18,19,20,21]
Materials Research comparison of conventional, microwave and spark plasma sintering techniques has been done in order to improve densification and mechanical properties of the alloy chosen
Summary
Aluminum (Al) was selected in this study due to its distinctive characteristics, such as low density (2.7 g/cm3) and combination of moderate strength, and high ductility, thermal conductivity, electric conductivity, corrosion-resistance[1]. The P/M aluminum alloys are gradually replacing Aluminium die casting that entail accurate net shaping and improved material utilization[4]. Later on many researchers have reported microwave sintering of many compacts fabricated through powder metallurgy and alloyed compositions (steel, stainless steel, copper, Al, Ni, Mo Co, Ti, Sn, etc) to nearly full density with improved mechanical properties[9,10,11,12,13,14,15,16,17,18,19,20,21]. Materials Research comparison of conventional, microwave and spark plasma sintering techniques has been done in order to improve densification and mechanical properties of the alloy chosen. The micro hardness value was calculated using the following formula
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