An internal casting feature can be difficult to evaluate without opening the component. Industrial computed tomography offers a three-dimensional examination route, while section cutting exposes a selected plane directly. Choosing between them starts with the engineering question, not with a preference for the newest instrument.

A development team may need to locate an internal indication, measure a hidden wall or examine material structure. Those objectives can require different evidence. A useful inspection plan explains what each method will establish and what remains outside its scope.

Define whether the question is geometry or material

CT can provide information about internal geometry and indications without cutting the component. However, scan resolution, material thickness, geometry and reconstruction settings affect what can be evaluated. A visually detailed volume is not automatically a qualified measurement of every small feature.

Sectioning provides access to the chosen plane for direct examination and further preparation. It sacrifices the sample and does not expose every region at once. If the plane misses the feature of interest, the cut may answer very little despite consuming the part.

Compare the routes before selecting samples

The methods can be combined. CT may help locate a region for a later cut, provided the coordinate relationship is controlled. That sequence can reduce the risk of cutting through the wrong place.

Qualify the scan for the actual component

ZEISS describes industrial CT as a method for examining internal features and structures. For a specific steel casting, the laboratory should confirm that its setup can address the required size and contrast. A capability statement for a small light-metal component should not be carried over automatically to a thick steel part.

Ask how the result will be evaluated and what uncertainty or detection limitations apply. If an acceptance threshold is involved, the method must be suitable for that decision. A colored image should not become a pass certificate without a defined evaluation basis.

Locate destructive cuts on a controlled drawing

For sectioning, identify the part, cut plane, orientation and region to preserve. Account for material lost during cutting and preparation. The laboratory should know whether the objective is a macro view, dimensional measurement or a prepared metallographic examination.

An illustrative investigation might use CT to identify an isolated internal indication, then section a sample through that location. The cut provides additional information while the scan preserves its relationship to the surrounding geometry. Neither result should be generalized to all production without an agreed sampling basis.

Retain raw evidence and disposition

Keep the original data, evaluation report and sample identity together. If thresholds or reconstruction settings change, record the reason. A later image generated under different settings should not silently replace the original result in a customer dossier.

For a TripleAce Castings development enquiry, state the hidden feature and the decision that depends on it. The inspection route can then be reviewed before samples are allocated or destroyed. This keeps the study focused and avoids paying for a sophisticated image that does not resolve the actual engineering uncertainty.

Inspection reference

ZEISS: CT Measuring Services describes industrial CT applications. The comparison above is a project-planning framework, not a claim that every casting or indication can be evaluated by a particular scanner.