Effect of Electromagnetic Stirring on the Reciprocating Wear Characteristics of A390 Alloy

Abstract:

Present study reports the effect of electromagnetic stirring (EMS) on reciprocating wear characteristics of A390 alloy. The microstructure features showed the refinement of eutectic silicon and reduction in size of primary silicon particles due to the effect of EMS. Hardness of the A390 alloy (100.28 BHN) prepared by EMS was higher than conventional A390 alloy (66.86 BHN). Reciprocating wear tests were carried out at different contact loads (15N to 90N) and speeds (0.2m/s to 1m/s) using pin-on-reciprocating plate tribometer for a constant sliding distance of 500m. As the reciprocating velocity increases from 0.2m/s to 1m/s, the wear loss of both EMS stirred and without stirred A390 alloys were found to decrease gradually up to the critical velocity 0.6m/s. It was noticed that above critical reciprocating velocity 0.6m/s, the wear loss was found to increase abruptly. Also, as the load increases from 15N to 90N, the wear loss of both the alloys were found to increase gradually up to 45N and thereafter abrupt increase in wear loss was noticed up to 90N. This clearly indicates a transition in the mode of wear from mild oxidative to severe metallic wear regime. Wear rate of without stirred A390 alloy in the region 45N to 90N showed predominant increase compared to EMS stirred A390 alloy. This trend suggests that EMS stirred A390 alloy is more coherent and stable under dry sliding wear conditions than without stirred A390 alloy.

• Periodical: Materials Science Forum (Volumes 830-831)
• Pages: 391-394
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.830-831.391
• Online since: September 2015
• Authors: G.L. Aswinikumar, V.R. Rajeev*, K. Jayaraj, A. Ashok Kumar, Bibin Emmanuvel, Jeswin Jose
• Keywords: A390 Alloy, Dry Sliding Wear, Electromagnetic Stirring, Microstructure, Wear Resistance

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