As conditions respectively, whereas 19.6 and 26.9% wear improvement

As the technology advances, it also has its drawbacks on day
to day life, some of the drawbacks of technology is strength, stiffness, wear
resistance and roughness. To overcome these drawbacks, new methods has been
introduced that is Metal Matrix Composite(MMC). MMCs are fabricated in order to
achieve a blend of all these properties, which leads to enhancement in their
mechanical behavior. The
limitation to the usage of MMCs is the fabrication cost. Methods
involved in MMC is stir casting, ball milling, pressure less in?ltration
technique and powder metallurgy 1–3. But of all these methods, stir casting
is widely adopted, due to its ease of fabrication and low cost 4. Due to the
low-cost process and the benefits involved with it, it is used in many
aerospace and in mechanical fields in present day. Out of all MMCs, aluminum
metal matrix has more advantages when compared to others due to high strength
to weight ratio, fatigue resistance, tribological properties and good thermal
conductivity. Moreover, aluminum is one such metal that can be alloyed with
sundry other materials

The main reason for the introduction of MMC is to reduce the
problems due to wear and its effects, wear is of two types abrasive wear and
adhesive wear. These types of wears are encountered by many materials occurs
when unconstrained particles are free to roll between two sliding or rolling
surfaces like in gear mechanisms and bearing surfaces.

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Natarajan et al. 6 performed dry sliding wear tests on Al
6061 hybrid metal matrix composites reinforced with ?y ash (3, 6 and 9 wt.%)
and graphite (?xed 3 wt.%), and found that a load of 9.81 N, speed of 4 m/s and
?y ash content of 9 wt.% gave minimum wear rate. Kaushik and Rao 9 have
worked on two-body abrasive wear behavior of Al 6082 hybrid composites and
results showed that a 15 N force and 200lm grit size reduced wear by 16.4 and
27% in cast and T6 heat treated conditions respectively, whereas 19.6 and 26.9%
wear improvement was observed when tested with 100 µm grit size. Sharma et al. 8
conducted dry sliding wear tests on graphite reinforced Al 6082 composites and
through response surface methodology (RSM) found that sliding distance was the
most in?uential factor and wear was affected least due to load applied. Harsha
and Tewari studied two-body and three-body abrasive wear behavior of
polyaryletherketone composites and efforts were made to correlate abrasive wear
performance with appropriate mechanical properties. Also, two-body abrasive
wear was found to be 30–50 times greater than three-body wear at different
loading conditions 9. Patnaik et al. 10 worked on three-body abrasive wear
of particulate ?lled glass epoxy composites and investigated the predominant
wear mechanisms. Aluminum/B4C composites (2.5, 5, and 7.5 wt. %) are
produced by stir casting technique and microstructural characteristics are
studied. It is observed that uniform distribution of B4C particles
is achieved in all composites due to stirring during casting process 14. Stir
cast aluminum/SiC MMCs have been fabricated for different volume fractions of
SiC and mechanical properties are studied on the composites. The results reveal
that increase in volume fraction of SiC in the composite increases hardness and
toughness 15. Aluminum 7075/Al2O3 composite is fabricated through stir
casting route and its tensile strength has been estimated and compared with
performance of aluminum alloy. It is concluded from the results that ultimate
tensile strength (UTS) of the composite is increased by 20% from that of
unreinforced aluminum alloy 16.

By
the above literature work, a new attempt has been made to fabricate
Titanium Sulfide(TiS2) reinforced Al LM13 composite and to study its
3-body abrasive wear characteristics