Additive & advanced manufacturing

Printed-part porosity

Porosity fraction with lack-of-fusion versus gas-pore classification from a cross-section.

ModalitiesPolished cross-sectionCT slice
Illustration of additively-manufactured metal porosity: irregular lack-of-fusion voids and round gas pores in a metal matrix
0.8%
Porosity
214
Pores
70 / 30
Gas / LoF

Example outputs shown for illustration. Numbers depend on your samples and protocol.

Image: Illustrative rendering (AI-generated), not a micrograph

Polished cross-section
A polished section with a recorded scale calibration.
CT slice
Reconstructed slices through the volume.

Results

Each measurement below comes from your own images, tied back to the annotated frame it came from, so results stay comparable across samples, locations, and conditions.

% area

Porosity %

Segmented area of the feature divided by the eligible area in the two-dimensional image.

Porosity0.8%
<1µm
1-2µm
2-4µm
>4µm

Example, not a claimed result

In your report: Per-field value, size distribution, and the segmentation overlay used.

% area

Pore count

Segmented area of the feature divided by the eligible area in the two-dimensional image.

Pores214
<1µm
1-2µm
2-4µm
>4µm

Example, not a claimed result

In your report: Per-field value, size distribution, and the segmentation overlay used.

class

Lack-of-fusion vs gas class

Each detected feature assigned to a class using the agreed rule set, shown on the image.

Gas / LoF70 / 30
<1µm
1-2µm
2-4µm
>4µm

Example, not a claimed result

In your report: Per-feature class, counts by class, and annotated overlays.

% area

Pore size distribution

Segmented area of the feature divided by the eligible area in the two-dimensional image.

Illustrative shape
<1µm
1-2µm
2-4µm
>4µm

In your report: Per-field value, size distribution, and the segmentation overlay used.

per area

Location map

Findings placed in sample coordinates to reveal spatial patterns and local density.

Illustrative shape
Bottom
64%
Corner
71%

In your report: Coordinate-referenced map, regional density, and representative images.

Built around your image set

Use the calibrated images your team already collects, together with the locations you need to compare.

01
Representative images
Provide representative polished cross-section images with a recorded scale calibration and the regions of interest clearly visible.
02
Image capture details
Record instrument, magnification, pixel scale, preparation method, and the smallest feature the review must resolve.
03
What to compare
State the samples, number of fields, and conditions to compare. A single field of view is not treated as a whole-sample result by itself.

Each report includes

The artifacts your team receives, ready for review and archive.

Annotated image set

Original images with regions of interest, measurement points, masks, and finding overlays.

Measurement table

Location-indexed values, units, distributions, and QC flags in a structured export.

Method record

Calibration evidence, analysis settings, version history, and validation summary.

Confidence in every resultTraceable measurements, reviewed against your agreed reference method.
Traceable scale
The report records the image scale, calibration evidence, and a method-specific expanded measurement uncertainty. It does not use one product-wide accuracy number.
Reference comparison
The configured method is compared with your accepted reference method or reviewed annotations, and reports bias by measurement range and image condition.
Detection performance
Detections are evaluated against reviewed reference regions with precision, recall, and segmentation overlap, separated by the conditions that affect performance.
Repeatability
The locked protocol is rerun on the same inputs and on a defined repeat set. The review records variation from image acquisition, sampling, and analysis separately where possible.

What this result does not establish: Classifies pores by shape from a 2D cross-section: rounded as gas, irregular as lack-of-fusion. A single plane samples the part; confirm bulk porosity by CT or Archimedes.

The measurement, today

Porosity is often a single density number from an Archimedes measurement. It says how much, never what kind or where, and the two pore types have different causes and fixes.

What it costs

Gas pores point at the powder; lack-of-fusion points at the laser parameters. Reporting only a percentage leaves engineers guessing which knob to turn.

From image to reviewed result

  1. 1

    Image the section

    Load a polished cross-section or a CT slice of the printed part.

  2. 2

    Threshold the pores

    Pores are separated from solid metal by adaptive thresholding.

  3. 3

    Classify by shape

    Rounded pores are labelled gas; irregular pores are labelled lack-of-fusion.

  4. 4

    Report and map

    Porosity fraction, pore size distribution, and a location map are exported.

Measuring a coating instead?

Use the Paint & Coatings workflow for layer thickness and coating porosity.

Printed-part porosity separates gas pores from lack-of-fusion features. Paint and coating cross-sections need a different protocol: trace the layer boundaries, measure thickness, segment pores inside the coating, and export the review overlays.

Explore Paint & Coatings
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