Disc shape performs; microstructure; spray forming; aluminum alloys
Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee 247667, India
Adv. Mater. Lett., 2012, 3 (1), pp 55-63
Publication Date (Web): Apr 10, 2012
Copyright © IAAM-VBRI Press
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.
Disc shape performs, microstructure, spray forming, aluminum alloys