Enhancing interlayer bonding strength of FDM 3D printing technology by diode laser-assisted system

• Published in: International journal of advanced manufacturing technology Vol. 108; no. 1-2; pp. 603 - 611
• Main Authors: Sabyrov, Nurbol, Abilgaziyev, Anuar, Ali, Md. Hazrat
• Format: Journal Article
• Language: English
• Published: London Springer London 01.05.2020; Springer Nature B.V
• Subjects: 3-D printers; Bonding strength; CAE) and Design; Computer-Aided Engineering (CAD; Critical point; Deposition; Diffusion layers; Engineering; Extrusion; Fused deposition modeling; Industrial and Production Engineering; Interlayers; Laser beam heating; Lasers; Machining; Mechanical Engineering; Media Management; Original Article; Polylactic acid; Rapid prototyping; Semiconductor lasers; Tensile tests; Three dimensional printing; Ultimate tensile strength; Interlayer diffusion; 3D printer; Anisotropy; FDM; Laser
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-020-05455-y

Fused deposition modeling (FDM) is the most widespread 3D printing technology. The primary reasons for this are its simplicity in manufacturing and low cost. The common issue of FDM is an anisotropic property of the extruded layer. Therefore, the mechanical strength of traditional machining methods is significantly better than FDM-fabricated parts. Implementation of diode laser (450 nm) with 5 W power for localized heating of the pre-deposition layer is proposed to overcome this problem. The laser power is controlled during the printing process. Thereby, layer interface temperature reached for critical point, where the bonding diffusion process between layers increased for the maximum level. The effect of the pre-deposing heating method is presented at different laser power values and printing speed. Tensile test results on PLA (polylactic acid) plastic specimen indicate a 10.16% increase in ultimate tensile strength at 2.84 W power of the laser. However, crack and hole formations indicate a negative result of intensive laser heating employment.