Validation of Contour Cut Model for Residual Stresses in AM-Repaired Simulated Defect by Neutron Diffraction

Josef Hodek, Štěpán Jedlan, Martin Ševeček, Jan Šaroun, Olena Levytska,
Michal Brázda, Antonín Prantl, Pavel Strunz

Institute of Physics, Czech Academy of Sciences, Řež

This study validates the accuracy and reliability of the Contour Cut Method (CCM) for residual stress assessment using neutron diffraction (ND) in a critical case — the repair of a simulated defect in a 316L component by Laser-Directed Energy Deposition (L-DED). CCM combines finite element modeling (FEM) with a series of precision cuts to recover residual stress data.

A strong agreement was observed between ND and CCM results. Neutron diffraction measurements along the sample’s central line revealed local stress maxima and minima, with the highest tensile stresses located in the L-DED region and the central part of the substrate.

The demonstrated correlation supports the applicability of CCM as a reliable technique for residual stress evaluation in various industrial contexts.