TITLE:
The Role of Corrugation Die Parameters on the Mechanical Properties of Aluminum Alloy (AA 5083) Processed by Repetitive Corrugation and Straightening
AUTHORS:
N. Thangapandian, S. Balasivanandha Prabu
KEYWORDS:
Repetitive Corrugation and Straightening, Strain Rate, Tensile Strength, Hardness, Grain Refinement
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.7,
July
16,
2015
ABSTRACT: The microstructure and mechanical
properties of aluminium alloy (AA 5083) processed through Repetitive
Corrugation and Straightening (RCS) was studied. The RCS process consists of
corrugating a flat specimen with a pair of systematically grooved dies and
straightening was done with two parallel flat dies. The aluminium samples were
subjected to RCS process using two different die: Die I-semi grooved die with
breath = height = 5 mm and θ = 30。 and Die II-semicircular profile with radius
= 10 mm. The specimens were subjected to maximum 8 passes for die I but the
other one went upto 14 pass. The grain refinement was studied from the
microstructure examination using TEM. The mechanical properties such as tensile
strength, hardness and the grain size were compared. The tensile strength and
hardness were found increasing with respect to the number of passes. The
tensile strength increased 25% in the sixth pass when compared to the parent
material. But the strength and hardness values were reduced at 8th pass due to
the surface cracks. The TEM studies showed that the Die-I is superior to Die-II
in terms of grain refinement.