Turbine manufacture often pushes conventional processes to their limits. That is why complex, curved components with intricate structures are increasingly produced using 3D printing. There are a range of test methods to find defects inside components. A research team from the Technical University of Munich (TUM) has now examined a number of methods in use. The best error detection rate achieved neutrons at the Heinz Maier-Leibnitz research neutron source (FRM II).