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

Abdul Rani, Arif (2025) Study the effect of mechanical properties on the immersed extremely aged FS3300PA PA-12 powder in sea water on YZY 0 degree orientation. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

Text (Full Text) Study the effect of mechanical properties on the immersed extremely aged FS3300PA PA-12 powder in sea water on YZY 0 degree orientation.pdf Download (3MB)

Abstract

This research investigates the impacts of prolonged seawater immersion on the mechanical characteristics, dimensional stability, and water absorption of Polyamide-12 (PA-12) FS3300PA components made with Selective Laser Sintering (SLS) 3D printing method. The study also aimed to examine the influence of layer thickness, laser power, and sintering orientation on the mechanical properties of aged PA-12. The specimens were separated into 10 groups: nine for aged powder and one for virgin powder as a baseline. With various layer thicknesses (0.07 mm, 0.12 mm, and 0.15 mm), laser power (65 W, 70 W, and 75 W), and orientations (YZY 0°, YZY 90°, and XYY 0°), the nine groups of aged powder were sintered. The performance of virgin and extremely aged PA-12 powders were compared before and after 1000 hours of seawater immersion. The results show that thinner layers and higher laser power resulted in stronger mechanical properties, greater water absorption, hence decreasing dimensional stability. Aged powder demonstrated higher tensile strength than virgin powder, while Young’s modulus and elongation at break achieved similarity between both. Mechanical performance was also affected by the sintering orientation; XYY 0° and YZY 90° produced better stiffness and tensile strength in comparison to YZY 0°. However, due to equipment malfunction, fracture behavior analysis to study the fracture morphologies using Scanning Electron Microscopy (SEM) could not be completed.

Actions (login required)

View Item