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Non-destructive Evaluation Of Internal Defects In Additive Manufactured Aluminium

  • : Lars Pejryd1, Patrik Karlsson1, Sebastian Hällgren2, Magnus Kahlin3
  • : 1Örebro University, 2SAAB Dynamics, 3Saab Aeronautics
  • : PDF Download
  • : 2016

Abstract

Additive Manufacturing is providing designers with new freedoms in design. Complex internal features is one distinct differentiator from other manufacturing methods. To industrially exploit AM to its full capacity, robust methods for the detection of potential internal flaws is needed. X-ray computed tomography (CT) holds the promise of being one of the few powerful tools for non-destructive imaging of internal features and flaws. The applicability of CT and other NDE methods is however not fully understood.

In this work, aluminium parts with different sizes of controlled internal defects in the form of slots of varying width, 0.1 – 0.4 mm were manufactured by SLM. The parts were produced as solids and with internal networks, both types containing the pre designed defects, and were used to evaluate the ability to detect the defects by computed tomography (CT), ultrasonic inspection and Eddy current (EC). The capabilities of the different methods are discussed.

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