Porosity, which arises during material manufacturing, significantly affects material performance and serves as a crucial quality metric in additive manufacturing. It impacts not only the mechanical attributes of the material but also its reliability and longevity.
Effects of porosity on performance:
– Strength reduction: Pores diminish material strength, particularly tensile and compressive strength.
– Weakened rigidity: Porosity lowers material rigidity, compromising the stability and load-bearing capacity of structural parts.
– Reduced durability: Porosity acts as a source of cracks, accelerating material aging and fatigue failure.
– Deteriorated chemical resistance: Porosity lessens the material’s chemical resistance, shortening its lifespan in harsh environments.
Mitigation strategies:
Optimizing fiber arrangement:
1. Utilize advanced fiber placement techniques, such as multi-axial placement, to ensure even fiber distribution and proper orientation.
2. Implement a fiber arrangement control system to minimize fiber randomness and enhance material uniformity.
Enhancing interlayer bonding:
1. Develop innovative interlayer bonding methods, like preheating the interlayer interface to strengthen interlayer adhesion.
2. Explore new interface treatment approaches, such as chemical or plasma treatment, to improve fiber-matrix interfacial bonding.
