Thickness Uniformity And Microstructure Of Disc shape Spray Formed Al-Si-Pb Alloys
Rashmi Mittal, Aruna Tomar, Devendra Singh
Volume 3, Issue 1, Page 55-63 | DOI: 10.5185/amlett.2011.5261
Disc shape performs; microstructure; spray forming; aluminum alloys
Spray forming technique was employed to produce a near net-shape disc of Al-Si-Pb alloys. Different substrate distances and inclination angles were studied to obtain the disc shape preforms. The substrate was also offset by 40 mm from the atomizer axis in case of 15 and 30 degree inclination angles. Microstructures were investigated in different regions of the preforms. Results exhibited equiaxed grains of primary Al and Si was present within these grains and along the grain boundary. The size of the Al grains was 20-30 µm and size of Si particles was sub-micron to 5 µm. The size of Pb particles varied from sub-micron to 20 µm and it was uniformly dispersed throughout the aluminum phase. Copyright © 2011 VBRI press.