A Study on Friction Stir Process of Magnesium Alloy AZ31 Sheet


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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



Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara




H. H. Hsu and Y.-M. Hwang, "A Study on Friction Stir Process of Magnesium Alloy AZ31 Sheet", Key Engineering Materials, Vols. 340-341, pp. 1449-1454, 2007

Online since:

June 2007




[1] W. M. Thomas, E. D. Nicholas, J. C. Needham, M. G. Murch, P. Templesmith, C.J. Dawes, Friction stir butt welding, international pattern application no. PCT/GB92/02203 and GB patent application no. 9125978. 8, 6 December (1991).

[2] C. G. Rhodes, M. W. Mahoney, W. H. Bingel, R.A. Spurling and C. C. Bampton, Effect of friction stir welding on microstructure of 7075 aluminum, Scripta Materialia, Vol. 36 (1987), pp.69-75.

DOI: https://doi.org/10.1016/s1359-6462(96)00344-2

[3] W. Tang, X. Guo, J. C. McClure , L. E. Murr and A. Nunes, Heat Input and Temperature Distribution in Fiction stir Welding, Journal of Materials Processing & Manufacturing Science, Vol. 7 (1998), pp.163-172.

DOI: https://doi.org/10.1106/55tf-pf2g-jbh2-1q2b

[4] M. Z. H. Khandkar, J. A. Khan and P. Reynolds, Prediction of temperature distribution and thermal history during friction stir welding: input torque based model, Science and Technology of Welding & Joining, Vol. 8 (2003), pp.165-174.

DOI: https://doi.org/10.1179/136217103225010943

[5] C. M. Chen and R. Kovacevic, Finite element modeling of friction stir welding-thermal and thermo mechanical analysis, International Journal of Machine Tools & Manufacture Design Research and Application, Vol. 43 (2003), pp.1319-1326.

DOI: https://doi.org/10.1016/s0890-6955(03)00158-5

[6] Y. J. Chao, X. Qi and W. Tang, Heat Transfer in Friction Stir Welding- Experimental and Numerical Studies, ASME, Vol. 125 (2003), pp.138-145.

[7] M Song and R. Kovacevic, Thermal modeling of friction stir welding in a moving coordinate system and it s validation, International Journal of Machine Tools & Manufacture Design, Research and Application, Vol. 43 (2003), pp.605-615.

DOI: https://doi.org/10.1016/s0890-6955(03)00022-1

[8] L. Fratini and G. Buffa, CDRX modeling in friction stir welding of aluminum alloys, International Journal of Machine Tools & Manufacture Design, Research and Application, Vol. 45 (2005), pp.1188-1194.

DOI: https://doi.org/10.1016/j.ijmachtools.2004.12.001

[9] C. Y. Chang, C. J. Lee and J. C. C. Huang, Relationship between grain size and Zener-Hollomon parameter during friction stir processing in AZ31 Mg alloys., Scripta Materialia, Vol. 51 (2004), pp.509-514.

DOI: https://doi.org/10.1016/j.scriptamat.2004.05.043

[10] Deform 3D V5. 0 User's Manual, SFC, Columbus OH, USA(2004).

[11] A.G. Beer and M.R. Barnett, Influence of initial microstructure on the hot working flow stress of Mg-3Al-Zn, Materials Science and Engineering A, Vol. 423 (2006), pp.292-299.

DOI: https://doi.org/10.1016/j.msea.2006.02.041