Modeling and optimization of friction stir welding parameters in joining 5086 H32 aluminium alloy.

Document Type: Article

Authors

1 Department of Mechanical Engineering Deenbandhu Chhotu Ram University of science and Technology, Murthal-131039 Sonepat, India.

2 Department of Mechanical Engineering Deenbandhu Chhotu Ram University of science and Technology, Murthal-131039 Sonepat, India

Abstract

The present manuscript focuses on developing a mathematical model to predict the
intergranular corrosion rate of friction stir welded AA5086 H32 aluminium alloy joints. Six
factors-Five levels central composite design matrix, having 52 experiments, is used for design
of experiments. The developed model is used to examine the impact of studied process
parameters i.e. rotational speed, welding speed, tool shoulder diameter, tool hardness, tilt
angle , and pin profile on intergranular corrosion rate of the welded joints. Response surface
methodology is used to optimize the process parameters for minimizing the susceptibility to
intergranular corrosion attack. The optimum combination of studied parameters, to have
minimum corrosion rate i.e. 3.2 mg/cm2, is obtained as 1296 rpm rotational speed, 79.4
mm/min welding speed, 14.9 mm tool shoulder diameter, 47.4 HRC tool hardness, 2.380 tilt
angle, and square pin profile.

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