TITLE:
Evaluation on Microstructure and Mechanical Behaviour of Al6061-Al2O3-Gr Hybrid Composites
AUTHORS:
Rajanna Manjunatha, Doddarasinakere Kempaiah Ravishankar, Govinda Panduranga Murthy Setty, Bengaluru Siddalingaiah Rakesh, Chalya Mallappaji Shiva Prasad, Rajesh Kumar
KEYWORDS:
Hybrid Composites, Casting, Liquid Metallurgy, Characterization of Al6061-Al2O3-Gr, Microstructure, Mechanical Behaviors, Quality Assessment
JOURNAL NAME:
Open Journal of Composite Materials,
Vol.9 No.3,
July
12,
2019
ABSTRACT: Metal matrix composites (MMCs) are gaining widespread
recognition in numerous technological fields owing to its superior mechanical
properties when compared with conventional metals/alloys. The aluminium based
hybrid composites are increasingly being used in the transport, aerospace,
marine, automobile and mineral processing industries, owing to the improved
strength, stiffness and wear resistance properties. In the present research work, the composites were prepared using the
liquid metallurgy technique, in which 2 - 10 weight percentage of Al2O3 particulates and 1 weight percentage of Graphite were dispersed in the base
Al6061 alloy. The Casted hybrid composites were subjected to machining process
to prepare the specimens according to ASTM standards. Then, the prepared
specimens are subjected for assessing the Microstructure followed by its
Mechanical behaviors such as, Hardness, Tensile strength, Compressive strength
respectively. The microstructure analysis confirms that homogenous distribution
of Al2O3 and Gr in the Al6061 matrix alloy and there was
a momentous enhancement in decisive tensile strength, compressive strength and
hardness properties of the hybrid composite. However, a substantial increase in
the compressive strength was noticed in graphite reinforced composites as the
graphite content was increased and there was a significant diminution in
hardness coupled with monotonic increases in the ductility. Further, the
ultimate tensile strength and compressive strength of the composite was noticed; thus the outcome of the study will provide explicit rationalizations
for these observable facts. Therefore, the proposed way out in the study can
provide ample of approaches to minimize the existing problem by employing this
newer hybrid composites.