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Transactions of the Indian Institute of Metals

, Volume 72, Issue 9, pp 2395–2402 | Cite as

Impact of Surface Alloying of Nickel on Microstructure, Hardness and Wear on Aluminium–12%Silicon Alloy

  • M. Krishnakumar
  • A. Mohnbabu
  • R. SaravananEmail author
Technical Paper
  • 15 Downloads

Abstract

An investigation was carried out to determine the effect of nickel on the microstructure, hardness and wear behaviour of surface alloying on aluminium–12%silicon alloy. The heat source utilized for modifying the surface was gas tungsten arc. Two hundred-micrometre-thick Ni–P coating was pre-deposited using electroless process on the aluminium–12%silicon alloy substrate. The surface alloying process was performed on the coated surface. By using microhardness tester and pin-on-disc wear testing machine, the hardness and wear rate of the modified layer were calculated, respectively. A refined grain structure was observed with the fusion of Ni in the alloyed layer. That was attributed to the rate of cooling in the modified layer. As a result of nickel addition, the hardness was improved and wear rate was found to decrease.

Keywords

Surface alloying Nickel Al–Si alloy Microstructure Hardness Wear rate 

Notes

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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  1. 1.Department of Mechanical Engineering, Amrita School of EngineeringAmrita Vishwa VidyapeethamCoimbatoreIndia

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