The Effects of Critical Welding Parameters on Tensile-Shear Properties of Friction Stir Spot Welded Polyethylene

Year 2017, Volume: 20 Issue: 4, 945 - 951, 20.12.2017

Bekir Çevik , Behçet Gülenç Ahmet Durgutlu

https://doi.org/10.2339/politeknik.369105

Cited By: 2

Abstract

The aim of this study was to investigate the weldability of high density
polyethylene via friction stir spot welding method. Polyethylene sheets were
joined with dwell times of 60 to 100 s, three different pin profiles (M6×1,
M6×1.25, M6×1.5) and pin lengths of 3.75 to 4.75 mm by using rotational speed
of 900 rpm and delay time of 45 s. During welding processes, the temperatures
were measured under the welding centers. The tensile-shear tests were performed
to welded samples. Also, macrostructures of welding nuggets were examined. The
small welding nuggets were formed by using the lower dwell time. The melting in welding nugget
occurred in the all dwell times during the welding. The dwell time affected on
the friction temperature. The key (pin) hole closed when sufficient friction
temperature (dwell times of 80 and 100 s). The pin profiles directly affected
the welding quality. Large screw pitch range of the pin and the small pin
length from 4.5 mm negatively affected the weld fracture load. Pin length of the stirring tool directly affected the
quality of welding. 

Keywords

FSSW, polyethylene, welding parameters, tensile-shear properties

References

• 1. Amanat N., James N.L. and McKenzie D.R., “Welding methods for joining thermoplastic polymers for the hermetic enclosure of medical devices”, Medical Engineering & Physic, 32: 690-699, (2010). 2. Saçak M., Polimer Teknolojisi, Gazi Kitabevi, Ankara, (2012). 3. Choudalakis G and Gotsis A.D., “Permeability of polymer/clay nanocomposites: a review”, European Polymer Journal, 45: 967-984, (2009). 4. Jagur-Grodzinski J., “Polymers for tissue engineering, medical devices, and regenerative medicine. Concise general review of recent studies”, Polymers for Advanced Technologies, 17: 395-418, (2006). 5. Stewart R., “Medical plastics: new polymers offer advantages for medical devices and packaging”, Plastics Engineering, 60: 20-27, (2005). 6. Baidya K.P., Ramakrishna S., Rahman M., Ritchie A. and Huang Z.M., “An investigation on the polymer composite medical device-external fixator”, Journal of Reinforced Plastics and Composites, 22: 563-590, (2003). 7. Juhl T.B., Christiansen J.C. and Jensen E.A., “Mechanical testing of polystyrene/polystyrene laser welds”, Polymer Testing, 32: 475-481, (2013). 8. Yousefpour A., Hojjati M. and Immarigeon J.P., “Fusion bonding/welding of thermoplastic composites”, Journal of Thermoplastic Composite Material,. 17: 303-341, (2004). 9. Van de Ven J.D. and Erdman A.G., “Bridging gaps in laser transmission welding of thermoplastics”, Journal of Manufacturing Science and Engineering, 129: 1011-1018, (2007). 10. Acherjee B., Misra D., Bose D. and Venkadeshwaran K., “Prediction of weld strength and seam width for laser transmission welding of thermoplastic using response surface methodology” Optics and Laser Technology, 41: 956-967, (2009). 11. Zhang M.Q. and Rong M.Z., “Theoretical consideration and modeling of self-healing polymers”, J. Polymer Sci. B Polymer Phys., 50: 229–241, (2012). 12. Yang Y.K, Dong H., Cao H., Chang Y.A. and Kou S., “Liquation of Mg alloys in friction stir spot welding”, Welding Journal, 87: 167-177, (2008). 13. Tozaki Y., Uematsu Y. and Tokaji K., “A newly developed tool without probe for friction stir spot welding and its performance”, Journal of Materials Processing Technology, 210(6-7): 844-851, (2010). 14. Kulekci M.K., Şık A. and Kaluç E., “Effects of tool rotation and pin diameter on fatigue properties of friction stir welded lap joints”, The International Journal of Advanced Manufacturing Technology, 36: 877-882, (2008). 15. Bilici M.K. and Yükler A.I., “Influence of tool geometry and process parameters on macrostructure and static strength in friction stir spot welded polyethylene sheets”, Materials and Design, 33: 145-152, (2012). 16. Kaçar R., Emre H.E, Demir H. and Gündüz S., “Friction stir spot weldability of Al-Cu-Al material couple”, Journal of the Faculty of Engineering and Architecture of Gazi University, 26 (2): 349-357, (2011). 17. Pathak N., Bandyopadhyay K., Sarangi M. and Panda S.K., “Microstructure and mechanical performance of friction stir spot-welded aluminum-5754 sheets”, Journal of Materials Engineering and Performance, 22: 131-144, (2013). 18. Gerlich A., Su P. and North T.H., “Tool penetration during friction stir spot welding of Al and Mg alloys”, Journal of Materials Science, 40: 6473-6481, (2005). 19. Bilici M.K., “Effect of tool geometry on friction stir spot welding of polypropylene sheets”, eXPRESS Polymer Letters, 6(10): 805-813, (2012). 20. Dashatan S.H., Azdast T., Ahmadi S.R. and Bagheri A., “Friction stir spot welding of dissimilar polymethyl methacrylate and acrylonitrile butadiene styrene sheets”, Materials and Design, 45: 135-141, (2013). 21. Arıcı A. and Mert Ş., “Friction stir spot welding of polypropylene”, Journal of Reinforced Plastics and Composites, 27(18): 2001-2004, (2008). 22. Bilici M.K., Yükler A.I. and Kastan A., “Effect of the tool geometry and welding parameters on the macrostructure, fracture mode and weld strength of friction-stir spot-welded polypropylene sheets”, Materiali in Tehnologije, 48 (5): 705-711, (2014).