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A Study on Friction Stir Process of Magnesium Alloy AZ31 Sheet

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Abstract:

Friction stir processes (FSP) are important for enhancing mechanical properties of metal sheets, such as the tensile strength, the elongation, etc. The stress distribution of the tool pin is affected by the thermo-mechanical characteristics of the workpiece in FSP. Recently, magnesium alloy AZ31 is widely used in machine industries due to the light-weight material property. In this paper, a thermo-mechanical model for FSP using three dimensional FEM analyses is proposed for exploring temperature distributions, strain distributions and stress distributions of the workpiece. The heat generated from the plastic deformation and the friction between the head tool and workpiece is considered as the heat source in the simulation of the FSP process. A commercial finite element code – DEFORM 3D is used to carry out the simulation of the plastic deformation of AZ31 sheets during the FSP. The analytical results of temperature, strain and stress distributions of the workpiece and head tool can provide useful knowledge for tool pin design in FSP

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1449-1454

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1449

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Online since:

June 2007

Authors:

Hung Hsiou Hsu, Yeong Maw Hwang

Keywords:

AZ31 Alloy, Finite Element Model (FEM), FSP, Heat Affected Zone (HAZ), TMAZ

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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