08

NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (4), P. 618–620

Influence of bismuth on the microstructure, hardness and dry sliding wear behavior of magnesium silicide reinforced magnesium alloy composite

D. E. Umesha – Bapuji Institute of Engineering and Technology, Davangere–577004, India
D. Shivalingappa – Adhiyamaan College of Engineering, Hosur–635109, India; dsivadvg@gmail.com
R. Kishore Kumar – Adhiyamaan College of Engineering, Hosur–635109, India; kishore.rg7@hotmail.com
Binto Tomy – Adhiyamaan College of Engineering, Hosur–635109, India
D. Ramesh Rao – M.S. Ramaiah Institute of Technology, Bangalore–560099, India

The modification effect of bismuth (Bi) on in-situ-formed magnesium silicide (Mg2Si) reinforced magnesium-aluminium (Mg–Al) alloy is investigated using optical microscope, scanning electron microscope and X-ray diffraction. Processing of the in-situ composite was carried out through a stir casting technique. The size of Mg2Si is significantly refined and the optimal modification effect was obtained when the Bi content in the composite is 1.4%. A slight decrease in hardness values and increase in wear resistance were observed in the study with bismuth addition.

Keywords: Mg–Al Alloy, bismuth, modifier, in-situ composite, wear resistance.

PACS 06.20.-f 12.60.Rc 61.10.Nz

DOI 10.17586/2220-8054-2016-7-4-618-620

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