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<p>This study investigates the effects of salt remelting treatment on the mechanical and tribological properties of 3D-printed polyethylene terephthalate (PET) fabricated via fused deposition modeling (FDM). Samples were treated at four different temperatures (170&#xa0;°C, 190&#xa0;°C, 210&#xa0;°C, and 220&#xa0;°C) using a fine salt medium to achieve uniform thermal exposure and structural confinement. Tensile, flexural, Shore D hardness, and adhesive wear tests were conducted. Among all conditions, the 210&#xa0;°C treatment yielded the best results, the tensile strength increased by up to 20.6%, flexural strength by 41.8%, and hardness by 9.6%. Additionally, the wear rate decreased by 74.2% at the optimal temperature of 210&#xa0;°C. Lower temperatures (170&#xa0;°C and 190&#xa0;°C) resulted in partial improvements, while treatment at 220&#xa0;°C caused slight thermal degradation. The performance enhancement is attributed to improved interlayer bonding and reduced void formation during the salt-assisted thermal process. This work introduces a novel, low-cost, and scalable post-processing technique for enhancing the structural integrity and functional performance of FDM-printed PET components.</p>

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Investigation of the effects of salt remelting treatment on the tensile, flexure, hardness and adhesive wear behavior of 3D-printed PET

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Okan Gul,
  • Busra Eyri,
  • N. Gamze Karsli,
  • Taner Yilmaz

摘要

This study investigates the effects of salt remelting treatment on the mechanical and tribological properties of 3D-printed polyethylene terephthalate (PET) fabricated via fused deposition modeling (FDM). Samples were treated at four different temperatures (170 °C, 190 °C, 210 °C, and 220 °C) using a fine salt medium to achieve uniform thermal exposure and structural confinement. Tensile, flexural, Shore D hardness, and adhesive wear tests were conducted. Among all conditions, the 210 °C treatment yielded the best results, the tensile strength increased by up to 20.6%, flexural strength by 41.8%, and hardness by 9.6%. Additionally, the wear rate decreased by 74.2% at the optimal temperature of 210 °C. Lower temperatures (170 °C and 190 °C) resulted in partial improvements, while treatment at 220 °C caused slight thermal degradation. The performance enhancement is attributed to improved interlayer bonding and reduced void formation during the salt-assisted thermal process. This work introduces a novel, low-cost, and scalable post-processing technique for enhancing the structural integrity and functional performance of FDM-printed PET components.