Aluminum die castings are widely used in automotive, electronics, and industrial equipment because of their strength-to-weight ratio and dimensional accuracy. However, internal porosity and shrinkage remain persistent quality challenges. X-ray NDT is the preferred method for verifying aluminum casting integrity without sectioning parts.

Optimize Fixture and Part Positioning

Consistent positioning ensures repeatable images and faster inspection cycles. Use dedicated fixtures that minimize part movement and align critical regions with the detector. Multi-axis systems allow operators to rotate parts and inspect complex geometries without multiple manual setups.

Set Appropriate Exposure Parameters

Aluminum has lower density than iron, requiring adjusted kV and mA settings. Overexposure can wash out fine porosity; underexposure hides defects in thick sections. Digital systems with real-time preview help technicians fine-tune parameters quickly.

Use Image Enhancement Wisely

Modern X-ray software applies noise filtering and edge enhancement to highlight defects. Micxy systems incorporate patented image enhancement algorithms that improve clarity while preserving defect characteristics—reducing operator subjectivity.

Establish Clear Acceptance Criteria

Define maximum allowable pore size, location restrictions (e.g., near sealing surfaces), and sampling vs. 100% inspection rules. Documented criteria support customer audits and continuous improvement programs.

Integrate NDT into Process Feedback

When X-ray results show recurring defects in specific cavities or shifts, feed data back to die design, shot parameters, and venting improvements. NDT becomes a process control tool—not just a final gate.