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<p>Poor interlayer bonding performance remains a significant challenge limiting the application of parts produced by the fused deposition modeling (FDM) technique. In this study, the specific mechanisms through which various FDM parameters influence interlayer tensile properties were systematically investigated using a single variable control method. To optimize the 3D printing process parameters for enhancing the interlayer bonding quality of polyether ether ketone (PEEK) FDM parts, a Taguchi experimental design was employed. The optimal combination of process parameters was determined to be nozzle temperature of 440&#xa0;°C, chamber temperature of 25&#xa0;°C, layer thickness of 0.1&#xa0;mm, and fan speed of 75%, under which interlayer tensile strength reached to 51.5&#xa0;MPa. Subsequently, post-annealing was conducted on specimens prepared under the optimal processing parameters at various temperatures. The results demonstrated that after annealing at 220&#xa0;°C for 4&#xa0;h, the interlayer tensile strength exhibited minimal changes, while the tensile modulus, flexural strength, and flexural modulus increased by 43.7%, 45.4%, and 27.2%, respectively. Annealing also significantly enhanced the mechanical properties of specimens printed flat and on-edge. This study presents a novel approach combining parameter optimization and post-annealing to achieve outstanding interlayer adhesion without sacrificing mechanical properties of other printing orientations. The optimal printing chamber temperature is room temperature, which can significantly facilitate open-environment printing of large-scale components and further enhances the engineering applications of PEEK FDM parts.</p>

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Enhancing interlayer mechanical properties of poly (ether ether ketone) fused deposition modeling parts by parameter optimization and post-annealing

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Jing Xu,
  • Yuguang He,
  • Shuangqiang Shi,
  • Sijia Hao,
  • Junpeng Tian,
  • Yubin Chen,
  • Shenglong Dai,
  • Cheng Yang

摘要

Poor interlayer bonding performance remains a significant challenge limiting the application of parts produced by the fused deposition modeling (FDM) technique. In this study, the specific mechanisms through which various FDM parameters influence interlayer tensile properties were systematically investigated using a single variable control method. To optimize the 3D printing process parameters for enhancing the interlayer bonding quality of polyether ether ketone (PEEK) FDM parts, a Taguchi experimental design was employed. The optimal combination of process parameters was determined to be nozzle temperature of 440 °C, chamber temperature of 25 °C, layer thickness of 0.1 mm, and fan speed of 75%, under which interlayer tensile strength reached to 51.5 MPa. Subsequently, post-annealing was conducted on specimens prepared under the optimal processing parameters at various temperatures. The results demonstrated that after annealing at 220 °C for 4 h, the interlayer tensile strength exhibited minimal changes, while the tensile modulus, flexural strength, and flexural modulus increased by 43.7%, 45.4%, and 27.2%, respectively. Annealing also significantly enhanced the mechanical properties of specimens printed flat and on-edge. This study presents a novel approach combining parameter optimization and post-annealing to achieve outstanding interlayer adhesion without sacrificing mechanical properties of other printing orientations. The optimal printing chamber temperature is room temperature, which can significantly facilitate open-environment printing of large-scale components and further enhances the engineering applications of PEEK FDM parts.