TITLE:
The Effect of Plastic Deformation and Magnesium Content on the Mechanical Properties of 6063 Aluminium Alloys
AUTHORS:
J.A. Omotoyinbo, I.O. Oladele
KEYWORDS:
aluminium, magnesium, cast, plastic deformation, mechanical properties, strengthening.
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.9 No.6,
June
20,
2010
ABSTRACT: In order to determine the effect of increased magnesium addition on the strengthening behaviour
during deformation, four types of aluminium alloys were cast and rolled. The cast aluminium
alloys contain; 0.451%Mg, 0.551%Mg, 0.651%Mg, and 0.751%Mg in addition to the other
elements which are constant. Deformation was carried out at 20% and 40%. The hot worked
profiles were machined into tensile test specimen and were subjected to tensile test. The result
was used to determine the ultimate tensile strength and the percentage elongation. From the
results, it was observed that the tensile properties of the aluminium alloys improved with
increase in percentage deformation and magnesium content up to 0.651%Mg. This shows the
effect of deformation on grain refinement. At high percentage of deformation and increased
magnesium content, the grains are more refined and this improves the strength and the
mechanical properties. However, at 0.751%Mg, a decrease in the tensile properties was
observed as deformation is no more effective. The result shows that there is a limit to the amount
of magnesium content that will give the optimum mechanical properties.