Aging-Induced Residual Stress Relaxation in Laser Powder Bed Fusion CM247LC Superalloy Parts Quantified by Neutron-Diffraction-Validated Eigenstrain Tomography
Description
This dataset provides the complete three-dimensional full-field reconstructions of residual stress and eigenstrain for a CM247LC superalloy component fabricated via Laser Powder Bed Fusion (LPBF), both in its as-printed and aging-treated (900 °C for 8 h) states. The data were generated using a mechanics-informed Eigenstrain Tomography framework validated by independent neutron diffraction measurements. The provided ZIP file contains high-resolution volumetric data in .vtu (VTK Unstructured Grid) format, which can be visualized and post-processed using open-source software such as ParaView. The datasets explicitly include the following tensor and scalar fields: - Eigenstrain (Eig.pvd) - Residual Elastic Strain (ElasticStrain.pvd) - Residual Stress (Stress.pvd) - Total Strain (TotalStrain.pvd) - Displacement (U.pvd) - von Mises Stress (VonMises.pvd) This repository aims to support total transparency in additive manufacturing process qualification and to provide a benchmark for researchers developing predictive simulations of thermal stress relief in nickel-based superalloys.
Files
Steps to reproduce
The .vtu files were generated using a custom inverse-modelling framework (Eigenstrain Tomography) that solves for the eigenstrain source terms using synchrotron X-ray diffraction projections as input. This specific dataset characterizes the residual stress and strain fields in LPBF-fabricated CM247LC superalloy both before and after an 8-hour aging treatment at 900 °C. For a detailed mathematical description of the reconstruction process and its numerical validation, please refer to the associated publication in Acta Materialia (https://doi.org/10.1016/j.actamat.2025.121872) titled 'Eigenstrain tomography: full-field residual stress reconstruction via polycrystalline diffraction projections'.