Study the effect of mechanical properties on the immersed extremely aged FS3300PA PA- 12 powder in sea water on XYY 0 degree orientation

Mustapha Kamal, Muhammad Al- Hadi Nashrullah (2025) Study the effect of mechanical properties on the immersed extremely aged FS3300PA PA- 12 powder in sea water on XYY 0 degree orientation. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

This research investigates the influence of layer thickness, laser power, and sintering orientation on the mechanical properties of virgin and extremely aged FS3300PA Polyamide 12 (PA-12) powder using the Selective Laser Sintering (SLS) 3D printing method. The study also explores the effects of prolonged seawater immersion on the material's dimensional stability, water absorption, and mechanical performance. A comprehensive literature review highlights the potential of PA-12 in demanding marine environments, focusing on its abrasion resistance, chemical stability, and mechanical strength, while emphasizing the impact of processing parameters on its performance. Methodologies involved preparing standard test specimens, sintering them with varying parameters (laser power: 65 W, 70 W, 75 W; layer thickness: 0.09 mm, 0.12 mm, 0.15 mm; orientations: XYY 0°, YZY 0°, YZY 90°), and immersing them in seawater for 1,000 hours to simulate aging. Mechanical properties were assessed through tensile tests to measure tensile strength, Young's modulus, and elongation at break. Results indicate that samples processed with 75 W laser power and 0.09 mm layer thickness demonstrated superior mechanical performance, achieving a tensile strength of 36.37 MPa, Young's modulus of 0.48 GPa, and elongation at break of 20.74%, even after seawater exposure. Orientation played a critical role, with XYY 0° exhibiting the highest mechanical integrity due to optimal interlayer bonding, while YZY 90° showed the lowest performance. The study underscores the importance of optimizing sintering parameters and build orientation to enhance durability and mitigate aging effects, providing valuable insights for the development of cost-effective, high-performance materials for industrial and marine applications.

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