As of MMCs is its fabrication cost. The

As the technology advances,
research in composites gains more importance in day today life. It is found
very difficult to meet modern day’s requirements with monolithic metals. Some
of the drawbacks of monolithic metals is its lower strength, stiffness, wear
resistance and toughness. To overcome these drawbacks, Metal Matrix Composites
(MMCs) have been introduced. MMCs are fabricated in order to improve these
properties, which give better mechanical behavior under critical conditions.
One of the limitation to the implementation of MMCs is its fabrication cost.
The different methods available for fabrication of MMCs are stir casting, ball
milling, pressure less in?ltration technique and powder metallurgy 1–3. But
among all these methods, stir casting is widely accepted because of its
easiness in fabrication and low cost 4. Thus, MMCs are widely accepted in
fields like aerospace, automotive and mechanical fields due to the low process
cost and the benefits involved with it. It was found that, out of all MMCs,
aluminum MMC are having more advantages when compared to others due to its high
strength to weight ratio, fatigue resistance, tribological properties and
thermal conductivity. Moreover, aluminum is one such metal that can be alloyed
with many other materials.

 Anandha Moorthy et al. 6 performed dry
sliding wear tests on Al 6061 hybrid MMC reinforced with ?y ash (3, 6 and 9
wt.%) and graphite (3 wt.%), and found that a load of 9.81 N, speed of 4 m/s
and ?y ash content of 9 wt.% gives minimum wear rate. Kaushik and Rao 7 have
worked on two-body abrasive wear behavior of Al 6082 hybrid composites and
results showed that a 15 N force and 200µm 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 9 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. 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. N. Radhika, K. Sai Charan performed stir casting technique to
fabricate Al LM 25/10 wt% TiC metal matrix composite and found that wear rate
was comparatively more at higher loads through Scanning electron microscope
(SEM)16. Aluminium based hybrid MMC with 0-30 wt-% of SiC/Al2O3
synthesized by liquid metallurgy technique and tested the mechanical properties
and wear characteristics. SEM results shows, as the weight percent of
reinforcement increase mechanical properties and wear resistance increases

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 N. Radhika et al 18 found taguchi technique
as a valuable technique to deal with responses influenced by multi-variables.
It is formulated for process optimization and detection of optimal combination of
the parameters for a given response This method is widely technique used
because it significantly reduces the number of trails that are required  to model the response compared with the
factorial design of experiments 19 .Based on the literature review, an
attempt is made to study the influence of wear parameters such as applied load,
speed and sliding distance on the dry sliding wear behavior of the Al metal
matrix composites using Taguchi design of experiment. Combined effect of the
above-mentioned parameters were also investigated by including their
interactions using ANOVA technique

  By the above literature work, it was found that research papers have
been done on optimization of two body abrasive wear process parameters. Thus,
a new attempt has been made to fabricate Titanium DiSulfide (TiS2)
reinforced LM13 composite and to study its 3-body abrasive wear characteristics
using Taguchi’s optimization technique.


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