Title: Determination of optimum aging temperature and time, mechanical and wear properties for Cu-9Ni-6Sn spinodal bronze alloy cast using permanent mould
Authors: Karthik V. Shankar; R. Sellamuthu
Addresses: Department of Mechanical Engineering, Amrita School of Engineering, Amritapuri Amrita Vishwa Vidyapeetham, Amrita University, India ' Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, India
Abstract: A detailed study was performed to find the optimum aging temperature and time for Cu-9Ni-6Sn spinodal alloy cast using permanent mould. The mechanical and wear properties of the alloy were determined and their variations with the aging temperature and time was researched for solutionised and aged condition. The as-cast dendritic structure was completely removed from the alloy after the heat treatment process. The top hardness was found to increase and then decreased with the aging temperatures and time. The optimum aging time and temperature for the Cu-9Ni-6Sn spinodal alloy were also determined. The tensile properties were found to be high when compared with that of the Cu-6Sn. The wear rate values exhibit a decrease with an increase in the hardness of the spinodal alloy. Characterisation of the spinodal alloy was conducted to discuss the wear mechanism and the fracture mode of the spinodal alloy.
Keywords: spinodal decomposition; Cu-Ni-Sn; optimum aging; permanent mould casting; gravity die casting; spinodal alloy; ductile fracture.
International Journal of Materials Engineering Innovation, 2017 Vol.8 No.1, pp.27 - 38
Received: 09 Dec 2016
Accepted: 09 Jan 2017
Published online: 14 Aug 2017 *