Porosity in Disk Shape Spray Formed Al-Si-Pb Alloy Preform
- *Corresponding Author:
- Devendra Singh
Department of Metallurgical and Materials Engineering
Indian Institute of Technology Roorkee
Fax: +91-1332-273560, 285243
Received Date: March 22, 2012; Accepted Date: June 18, 2012; Published Date: June 20, 2012
Citation: Tomar A, Singh D (2012) Porosity in Disk Shape Spray Formed Al-Si-Pb Alloy Preform. J Powder Metall Min 1:102. doi: 10.4172/2168-9806.1000102
Copyright: © 2012 Tomar A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Spray forming technique was employed to produce a disc shape preform of Al-Si-Pb alloys. Porosity of this disc was investigated as a function of lead content and the distance from centre to periphery of the disc. The porosity decreases with distance from centre to periphery for all compositions of lead. The decay rate in porosity increases with the increase in lead content. Also the decay rate in porosity decreases towards the periphery of the deposit. The areas having large and small amount of porosity were observed in the microstructure of Al-Si-Pb alloys. The large and small amount porosity areas belong to the lead and aluminum rich areas, respectively.