How to Assess Porosity Non-Destructively

How It Works

Porosity reduces the effective stiffness and density of a material. In case of dissipative defects, it also increases internal energy dissipation. These effects are directly reflected in:

• Resonance frequencies — decrease with higher porosity
• Damping behavior — increases with higher porosity

Compared to dense reference parts, components with higher porosity show measurably different resonance characteristics.

Ideal Applications

GrindoSonic IET is an effective non-destructive solution for:

• Porosity monitoring — track porosity levels across production
• Process control — optimize parameters to minimize porosity
• 100% quality inspection — test every part, not just samples

Especially valuable in Additive Manufacturing and powder-based production processes where porosity is a common concern.

Materials

Over the years we have collaborated with multiple academic and industrial partners to identify porosity in their materials. A large range of materials was tested:

• Ceramics
• Metals and alloys
• Polymers