Ranvir Singh Panwar

Tribological Characteristics of Aluminium Tri-Reinforced Particles (Al-TRP) Composites Developed by Liquid Metallurgy Route

Discontinuous reinforced aluminum matrix composites (DAMCs) are widely used in automobiles, military and many other engineering areas due to their attractive properties. DAMCs are used in automobile industries for manufacturing bogies, cars and other structural components. Apart from this it is also used in components which are subjected to high temperatures. In the present work we have studied the tribological characteristics of DAMCs containing zircon sand, SiC and Zirfloor as reinforced ceramic particles in Al alloy. These three types of ceramic particles (particle size 0-32 µm) are reinforced in the Al-12Si alloy (LM13) by liquid metallurgy route (stir casting technique). Total 15 wt% of the tri reinforced particles (TRP) are added in LM13 alloy to fabricate Al–TRP composite for tribological application. Wear characteristics of Al–TRP composites have been investigated under dry sliding conditions. Dry sliding wear tests have been carried out using a pin-on-disc method at 1Kg and 5Kg loads. Sliding distance during the wear test was about 3000 meters with a constant sliding velocity of 1.6 ms-1. In the study it was observed that wear rate of the composite increases with increase in amount of load. Microhardness measurement was done for the developed Al-TRP composite. SEM images of wear track on composite gives better idea of the wear mechanism. Wear debris collected after the wear test was also examined for deeper understanding of wear behavior. Study reveals that about equal amount of ZrSiO4, SiC and Zirfloor reinforced particle in Al-TRP composite exhibits better wear resistance compared to aluminum base alloy.

Tribological properties of Zircon sand and Zirfloor reinforced LM13 alloy matrix composite-A comparative study

The tribological behaviour of samples of LM13 alloy matrix reinforced with 15 wt. % Zircon sand also 15wt.% and Zirfloor particles in low and high range of loads (1kg and 5kg) was determined using a pin-on-disc wear and friction monitor at a constant velocity of 1.6 m/s. Zircon sand and Zirfloor sand (particles size 5-32μm) are reinforced in the LM13 alloy by stir casting method. Optical microscopy show uniform distribution of particles and reveal better bonding in the case of zircon particles reinforced composite compared to that in zirfloor particles reinforced composite. It is observed that the zircon particle reinforced composite shows relatively better wear resistance property compared to zirfloor-reinforced composite.

Study of wear mechanism for LM13/Zr composite under dry sliding conditions at different loads

In the present paper, well known piston alloy (LM13) reinforced with ZrSiO4 particles was developed and studied as wear resistant material. The particle reinforced aluminum metal matrix (PAMC) was developed by stir casting route. Composite was developed by reinforcing 10 wt. % of ZrSiO4 particles into LM13 alloy. Wear behavior of LM13 alloy reinforced with ZrSiO4 particles have been carried out with different applied load. Micrographs of worn surfaces after wear test were examined by scanning electron microscope. These micrographs indicate the presence of the adhesive and abrasive wear mechanism, and transition from mild to severe wear at higher load.