Title: An investigation of the effect of Ni content and hardness on the wear behaviour of sand cast Cu-Ni-Sn alloys

Authors: S. Ilangovan; R. Sellamuthu

Addresses: Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Ettimadai Post, Coimbatore – 641105, Tamil Nadu, India. ' Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Ettimadai Post, Coimbatore – 641105, Tamil Nadu, India

Abstract: Alloys of Cu-Ni-Sn with varying wt. %Ni have been cast in sand moulds. Specimens were homogenised, solubilised and aged to induce spinodal decomposition and were used for hardness and wear testing with a pin-on-disc unit under dry sliding condition in air. Ni increases the peak hardness and decreases the aging time, implying that it contributes significantly to the process of spinodal decomposition. The wear rate is found to be a function of hardness. The coefficient of friction is observed to be a constant and independent of hardness.

Keywords: spinodal decomposition; copper alloys; tin; hardness; coefficient of friction; aging treatment; nickel content; wear behaviour; sand casting; dry sliding.

DOI: 10.1504/IJMMP.2012.048522

International Journal of Microstructure and Materials Properties, 2012 Vol.7 No.4, pp.316 - 328

Available online: 14 Aug 2012 *

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