Abstract
The effects of rotational and welding speed on the mechanical properties and thermal behavior in friction stir welded joints of high-density polyethylene using a non-rotational shoulder have been investigated experimentally. Tensile properties and hardness were measured to determine the mechanical properties, and the effect of the welding parameters. Heating and cooling cycles of differential scanning calorimetry were used to establish thermal properties. Microstructure observations complemented experimental observations. Results showed that tensile strength, hardness, and crystallinity decreased when rotational speed was increased, while the welding speed effect was weak. Deleterious phenomena on molecular structure of the stir region were explained by means combination of selected welding parameters and the material flow during the process.
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Acknowledgments
The authors wish to thank Universidad Autónoma del Caribe for its financial support for this research through project CONV-I-004-P012. Special thanks to Dr. Juan F. Santa (ITM) and MSc. Ricardo Mendoza for their selfless and meaningful help with some measurements and fruitful discussions.
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Moreno-Moreno, M., Macea Romero, Y., Rodríguez Zambrano, H. et al. Mechanical and thermal properties of friction-stir welded joints of high density polyethylene using a non-rotational shoulder tool. Int J Adv Manuf Technol 97, 2489–2499 (2018). https://doi.org/10.1007/s00170-018-2102-y
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DOI: https://doi.org/10.1007/s00170-018-2102-y