Skip to main content
SpringerLink
Log in

FE modelling of microstructure evolution during friction stir spot welding in AA6082-T6

  • Research Paper
  • Published:
Welding in the World Aims and scope Submit manuscript

Abstract

Friction stir spot welding (FSSW) is a solid-state joining method, which is a variant of friction-stir welding. Microstructure analysis shows that the FSSW joint contains four different zones, namely the stir zone, thermo-mechanical affected zone, heat-affected zone and base metal, respectively. In this paper, the results of a FE analysis of the FSSW process of AA6082-T6 considering geometric dynamic recrystallization are presented. A physically based model taking into account three internal state variables was implemented into the commercial FE package DEFORM-3D to describe the microstructure evolution during FSSW. This model allows predicting the dislocation density, grain size, temperature, effective strain, and strain rate during FSSW. The microstructure in stir zone was analysed by electron backscattered diffraction. Experimental and simulation results have been compared to validate the model.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

  1. Khosa S, Weinberger T, Enzinger N (2007) Finite element analysis of material flow patterns in friction stir spot welding of Al 6082-T6 using different process parameters and tool geometries. 5th Int Conf Heat Transf Fluid Mech Thermodyn

  2. Mishra RS, Ma ZY (2005) Friction stir welding and processing. Mater Sci Eng, R 50:1–78

    Article  Google Scholar 

  3. Poletti C, Rodriguez-Hortalá M, Hauser M, Sommitsch C (2011) Microstructure development in hot deformed AA6082. Mater Sci Eng, A 528:2423–2430

    Article  Google Scholar 

  4. Blum W, Zhu Q, Merkel R, McQueen HJ (1996) Geometric dynamic recrystallization in hot torsion of Al-5Mg-0.6Mn. Mater Sci Eng, A 205:23–30

    Article  Google Scholar 

  5. Pettersen T, Holmedal B, Nes E (2003) Microstructure development during hot deformation of aluminium to large strains. Metall Mater Trans A 34:2737–2744

    Article  Google Scholar 

  6. Kassner ME, Barrabes SR (2005) New developments in geometric dynamic recrystallization. Mater Sci Eng, A 410–411:152–155

    Google Scholar 

  7. De Pari L Jr, Misiolek WZ (2008) Theoretical predictions and experimental verification of surface grain structure evolution for AA6061 during hot rolling. Acta Mater 56:6174–6185

    Article  Google Scholar 

  8. DEFORM-3D V6.1 User's manual, SFC, Columbus, Ohio, USA, 2007

  9. Nes E (1998) Modelling of work hardening and stress saturation in fcc metals. Prog Mater Sci 41:129–193

    Article  Google Scholar 

  10. Sherstnev P, Melzer C, Sommitsch C (2012) Prediction of precipitation kinetics during homogenisation and microstructure evolution during and after hot rolling of AA5083. Int J Mech Sci 54:12–19

    Article  Google Scholar 

  11. Roters F, Raabe D, Gottstein G (2000) Work hardening in heterogeneous alloys—a microstructural approach based on three internal state variables. Acta Mater 48:4181–4189

    Article  CAS  Google Scholar 

Download references

Acknowledgments

The K-Project Network of Excellence for Joining Technologies JOIN4+ is fostered in the frame of COMET—Competence Centers for Excellent Technologies by BMVIT, BMWFJ, FFG, Land Oberösterreich, Land Steiermak, SFG, and ZIT. The programme COMET is handled by FFG.

Author information

Authors and Affiliations

  1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China

    Z. Gao & J. T. Niu

  2. Institute for Materials Science and Welding, Graz University of Technology, Graz, Austria

    Z. Gao, F. Krumphals, N. Enzinger & C. Sommitsch

  3. JOIN 4 + − Network of Excellence for Joining, Graz, Austria

    Z. Gao, F. Krumphals, N. Enzinger & C. Sommitsch

  4. Institute for Electron Microscopy and Fine Structure Research (FELMI), Graz University of Technology, Graz, Austria

    S. Mitsche

Authors
  1. Z. Gao
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. T. Niu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. F. Krumphals
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. N. Enzinger
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. S. Mitsche
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. C. Sommitsch
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Z. Gao.

Additional information

Doc. IIW-2401, recommended for publication by Commission IX "Behaviour of Metals Subjected to Welding."

Rights and permissions

Reprints and permissions

About this article

Cite this article

Gao, Z., Niu, J.T., Krumphals, F. et al. FE modelling of microstructure evolution during friction stir spot welding in AA6082-T6. Weld World 57, 895–902 (2013). https://doi.org/10.1007/s40194-013-0083-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s40194-013-0083-x

Keywords

Search

Navigation