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Corrosion behavior of stir-cast Al–TiB2 metal matrix composites

  • Suswagata Poria , Goutam Sutradhar and Prasanta Sahoo
Published/Copyright: January 30, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 2

Abstract

The present study evaluates the corrosion behavior of Al–TiB2 metal matrix composites in 3.5% NaCl solution. Composites are fabricated using stir-casting with varying wt.% of TiB2. Composite surfaces are characterized using scanning electron microscopy (SEM) images. Micro-hardness values of composites are obtained using a Vicker's micro-hardness tester. The hardness of the base matrix is enhanced due to the incorporation of hard TiB2 phase. Corrosion characteristics of composites are investigated using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Corrosion resistance of composites is estimated from the parameters such as corrosion potential, corrosion current, linear polarization resistance etc. Corrosion resistance of the base alloy improves due to incorporation of TiB2 but only up to a certain amount of TiB2 phase in the matrix. The composite with 1 wt.% TiB2 shows the highest corrosion resistance. Corroded surfaces are studied using SEM images that reveal localized pitting corrosion on composite surfaces.

Keywords: AMC; Corrosion; EIS; TiB2; Stir-casting
*Correspondence address, Prof. Prasanta Sahoo, Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India, Tel.: +913324572660, E-mail:

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Received: 2018-05-23
Accepted: 2018-08-14
Published Online: 2019-01-30
Published in Print: 2019-02-12

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111731
Keywords for this article
AMC; Corrosion; EIS; TiB2; Stir-casting

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Nanoindentation analysis methods examined with finite element simulations
  5. Experimental investigation of gas/matte/spinel equilibria in the Cu–Fe–O–S system at 1250°C and P(SO2) = 0.25 atm
  6. Replacing martensite with nanobainite in moderately alloyed carburised steel for better wear performance
  7. Microstructure, hardness and wear behaviour of NbC reinforced AA7075 matrix composites fabricated by friction stir processing
  8. Microstructure, mechanical, and high-stress abrasive wear behaviour of as-cast and heat-treated Al–Si–SiCp composite
  9. Mechanical and morphological properties of bamboo mesoparticle/nylon 6 composites
  10. Particle and microstructural characteristics in the coarse-grained heat-affected zone of Al–Ti–Ca complex deoxidized steels
  11. Corrosion behavior of stir-cast Al–TiB2 metal matrix composites
  12. Correlation between anodization variables and surface properties of titania nanotube arrays for dye-sensitized solar cells
  13. Wetting and sealing of the interface between silicate glass and copper
  14. Short Communications
  15. Investigation of MWCNTs addition on mechanical properties of cordierite glass-ceramic composites
  16. DGM News
  17. DGM News
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