A study of the parameters influencing mechanical properties and the fatigue performance of refill friction stir spot welded AlMgSc alloy

  • Sara Beatriz Miranda Lage
  • Leonardo Contri CampanelliEmail author
  • Ana Paula de Bribean Guerra
  • Junjun Shen
  • Jorge Fernandez dos Santos
  • Paulo Sergio Carvalho Pereira da Silva
  • Claudemiro Bolfarini


Friction spot welds of 1.6-mm-thick AlMgSc alloy were investigated in this work. A design of experiment method was used to evaluate the effect of process parameters on the shear static strength. The optimized condition of parameters was employed in the assessment of the fatigue behavior. The typical hook feature was minimized by restricting the tool penetration into only the upper sheet. As a consequence, shear strength was sensitive to the extension of the welded region rather than the hook morphology. The fatigue performance was affected by the multiple crack initiation sites that resulted from a complex stress state during the axial loading. Striations were observed in practically the entire crack propagation region, suggesting that unstable fatigue crack growth did not take place in this specific weld configuration.


Refill friction stir spot welding Design of experiments Aluminum Shear strength Fatigue 


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Authors acknowledge Mr. Manfred Horstmann and Mr. Hamdi Tek for their technical support in performing the fatigue tests.

Funding information

This study was financially supported by the Brazilian institutions CNPq and FAPESP (process n. 2016/12995-5).


  1. 1.
    Aleris (2015) Aerospace Aluminum AA5028 AlMgSc – The Strong Lightweight. Accessed 15 May 2018
  2. 2.
    Pacchione M, Telgkamp J (2006) Challenges of the metallic fuselage. In: 25Th International Congress of the Aeronautical Sciences (ICAS 2006)Google Scholar
  3. 3.
    Kendig KL, Miracle DB (2002) Strengthening mechanisms of an Al-mg-Sc-Zr alloy. Acta Mater 50(16):4165–4175CrossRefGoogle Scholar
  4. 4.
    dos Santos JF, Olea CAW, Coelho RS, Kostka A, Paglia CS, Ghidini T, Donne Eads CD (2010) Metallurgy and weld performance in friction stir welding. In: Lohwasser D, Chen Z (eds) Friction stir welding – from basics to applications. Woodhead Publishing, Cambridge, pp 314–410CrossRefGoogle Scholar
  5. 5.
    Zhao J, Jiang F, Jian H, Wen K, Jiang L, Chen X (2010) Comparative investigation of tungsten inert gas and friction stir welding characteristics of Al-mg-Sc alloy plates. Mater Design 31:306–311CrossRefGoogle Scholar
  6. 6.
    Schilling C, dos Santos J (2004) Method and device for linking at least two adjoining work pieces by friction welding. US patent 6,722,556 B2Google Scholar
  7. 7.
    de Barros PAF, Campanelli LC, Alcântara NG, dos Santos JF (2017) An investigation on friction spot welding of AA2198-T8 thin sheets. Fat Fract Eng Mater Struc 40:535–542CrossRefGoogle Scholar
  8. 8.
    Sanatana LM, Suhuddin UFH, Ölscher MH, Strohaecker TR, dos Santos JF (2017) Process optimization and microstructure analysis in refill friction stir spot welding of 3-mm-thick Al-mg-Si aluminum alloy. Int J Adv Manuf Tech 91:1–8CrossRefGoogle Scholar
  9. 9.
    Badarinarayan H, Shi Y, Li X, Okamoto K (2009) Effect of tool geometry on hook formation and static strength of friction stir spot welded aluminum 5754-O sheets. Int J Mach Tools Manuf 49:814–823CrossRefGoogle Scholar
  10. 10.
    Rosendo T, Parra B, Tier MAD, da Silva AAM, dos Santos JF, Strohaecker TR, Alcântara NG (2011) Mechanical and microstructural investigation of friction spot welded AA6181-T4 aluminium alloy. Mater Design 32:1094–1100CrossRefGoogle Scholar
  11. 11.
    Campanelli LC, Suhuddin UFH, Antonialli AÍS, dos Santos JF, Alcântara NG, Bolfarini C (2013) Metallurgy and mechanical performance of AZ31 magnesium alloy friction spot welds. J Mater Process Tech 213:515–521CrossRefGoogle Scholar
  12. 12.
    Cao JY, Wang M, Kong L, Guo LJ (2016) Hook formation and mechanical properties of friction spot welding in alloy 6061-T6. J Mater Process Tech 230:254–262CrossRefGoogle Scholar
  13. 13.
    Effertz PS, Infante V, Quintino L, Suhuddin U, Hanke S, dos Santos JF (2016) Fatigue life assessment of friction spot welded 7050-T76 aluminium alloy using Weibull distribution. Int J Fatigue 87:381–390CrossRefGoogle Scholar
  14. 14.
    Plaine AH, Suhuddin UFH, Alcântara NG, dos Santos JF (2016) Fatigue behavior of friction spot welds in lap shear specimens of AA5754 and Ti6Al4V alloys. Int J Fatigue 91:149–157CrossRefGoogle Scholar
  15. 15.
    American Welding Society (2013) Specification for Resistance Welding for Aerospace Applications AWS D17.2/D17.2M, 2nd edn. American Welding Society, DoralGoogle Scholar
  16. 16.
  17. 17.
    Sauvage X, Dédé A, Cabello Muñoz A, Huneau B (2008) Precipitate stability and recrystallisation in the weld nuggets of friction stir welded Al-mg-Si and Al-mg-Sc alloys. Mater Sci Eng A 491:364–371CrossRefGoogle Scholar
  18. 18.
    Tier MD, Rosendo TS, dos Santos JF, Huber N, Mazzaferro JA, Mazzaferro CP, Strohaecker TR (2013) The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds. J Mater Process Tech 213:997–1005CrossRefGoogle Scholar
  19. 19.
    Adib H, Jeong J, Pluvinage G (2004) Three-dimensional finite element analysis of tensile-shear spot-welded joints in tensile and compressive loading conditions. Strength Mater 36:353–364CrossRefGoogle Scholar

Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  • Sara Beatriz Miranda Lage
    • 1
  • Leonardo Contri Campanelli
    • 1
    Email author
  • Ana Paula de Bribean Guerra
    • 1
  • Junjun Shen
    • 2
  • Jorge Fernandez dos Santos
    • 2
  • Paulo Sergio Carvalho Pereira da Silva
    • 1
  • Claudemiro Bolfarini
    • 1
  1. 1.Department of Materials EngineeringFederal University of São CarlosSão CarlosBrazil
  2. 2.Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, Solid State Joining ProcessesGeesthachtGermany

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