Collaborative R&D Project 2017

Capabilities of X-Ray CT for NDT of SLM Parts

© Fraunhofer ILT

What are the capabilities of X-Ray CT for defect detection in 'standard' AM Parts?


Challenge and Motivation

  • Characteristic size and shape of defects in parts manufactured by SLM in comparison to casted or wrought parts
  • Measuring resolution (“Voxel-Size”) of CT is limited by part dimensions, material and selected measuring setup
  • Resolution and failure detection capability for typical SLM (inner) structures (channels, walls) not evaluated


  • Manufacturing of test parts with typical features of turbomachinery parts and measurement of integrated (internal) structures and its characteristic defects by CT
  • Comparison of CT-scans with cross sections. Benchmark for applicability of NDT by X-Ray CT on the AM-Process quality assurance