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A study on the overall variance and void architecture on MEX-PLA tensile properties through printing parameter
Mirza Faizaan1,2, Satish Shenoy Baloor3, Srinivas Nunna2
1Department of Aeronautical and Automobile Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
Scientific Reports
|January 24, 2025
Summary
Optimizing fused filament fabrication (FFF) for poly(lactic) acid (PLA) showed that larger nozzle diameters and finer layer thicknesses improve tensile properties by reducing internal voids. Process consistency was high across tested parameters.
Area of Science:
- Materials Science
- Additive Manufacturing
- Polymer Engineering
Background:
- Fused Filament Fabrication (FFF) is a widely used additive manufacturing technique for polymers like poly(lactic) acid) (PLA).
- Optimizing printing parameters is crucial for enhancing mechanical properties and understanding structure-property relationships in FFF-produced parts.
- Void architecture significantly impacts the tensile performance of 3D-printed components.
Purpose of the Study:
- To investigate the influence of printing parameters on the tensile properties and void architecture of PLA parts fabricated via FFF.
- To identify optimal parameter combinations for maximizing tensile performance using Taguchi optimization methods.
- To establish structure-property relationships linking printing parameters, void content, and mechanical behavior.
Main Methods:
- Utilized two Taguchi optimization methods to determine optimal printing parameters.
- Fabricated poly(lactic) acid (PLA) parts using the fused filament fabrication (FFF) technique.
- Employed micro-computed tomography (micro-CT) to quantify void characteristics and analyze internal structure.
- Assessed tensile properties including tensile strength and modulus.
Main Results:
- A positive correlation was found between tensile performance and nozzle diameter (ND).
- Minimal variation (5.5%) in tensile strength and modulus indicated high process consistency.
- Micro-CT analysis confirmed that ND and layer thickness (LT) influence void architecture.
- Larger NDs combined with finer LTs resulted in superior tensile properties due to reduced void content.
Conclusions:
- Printing parameters, particularly nozzle diameter and layer thickness, significantly affect the void architecture and tensile properties of FFF-printed PLA.
- Optimal parameter combinations can enhance mechanical performance by minimizing internal voids.
- This study provides insights into structure-property relationships for MEX-based PLA, crucial for material selection and process design.
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