Open AccessComparative fluidity study of AA7075 unreinforced alloy and Al2O3 reinforced composite
Author(s) -
P A Roshitha,
Malavika Arun
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1114/1/012068
Subject(s) - aluminium , materials science , composite number , alloy , aluminium alloy , metal matrix composite , composite material , aluminium oxide , 6063 aluminium alloy , viscosity , metallurgy
Aluminium alloys are used extensively in the automobile and aerospace areas. The reason behind this is the high strength to weight ratio of aluminium and its alloys. As requirement for better materials arose, the existing aluminium alloys evolved into composite forms. Composites can enhance the mechanical properties of the metal matrix. The property which gets improved depends upon the reinforcement. But the problem associated with composites is their poor fluidity. There are only a handful of researches conducted to evaluate the effects of reinforcing agents on composite fluidity. Fluidity is expressed in terms of fluidity length or flow length. It is defined as the maximum length the molten metal will flow in a long channel before solidifying. In this work, the fluidity characteristics of AA7075 alloy and AA7075 alloy reinforced with aluminium oxide (Al 2 O 3 ) are explored. It was found that the fluidity length of aluminium alloy AA7075 decreased by almost 20 cm on addition of the reinforcing agent, aluminium oxide. This may be due to the tendency of alumina particles to cluster together or accumulate in the aluminium matrix. This increases the viscosity and thereby reduces the fluidity length.