Pathways toward the Use of Non-Destructive Micromagnetic Analysis for Porosity Assessment and Process Parameter Optimization in Additive Manufacturing of 42CrMo4 (AISI 4140) [Dataset]
Description
Laser-based powder bed fusion of metals (PBF-LB/M) is a widely applied additive manufacturing technique. Thus, PBF-LB/M represents a potential candidate for the processing of quenched and tempered (Q&T) steels such as 42CrMo4 (AISI 4140), as these steels are often considered as the material of choice for complex components, e.g., in the toolmaking industry. However, due to the presence of process-induced defects, achieving a high quality of the resulting parts remains challenging in PBF-LB/M. Therefore, an extensive quality inspection, e.g., using process monitoring systems or downstream by destructive or non-destructive testing (NDT) methods, is essential. Since conventionally used downstream methods, e.g., X-ray computed tomography, are time-consuming and cost-intensive, micromagnetic NDT measurements represent an alternative for ferromagnetic materials such as 42CrMo4. A system combining several micromagnetic NDT measurement methods is the micromagnetic multiparametric microstructure and stress analyzer (3MA), developed by the Fraunhofer Institute for Nondestructive Testing IZFP (Saarbrücken, Germany). The results of 3MA measurements have already been correlated with various material properties, however, the use of the 3MA technology for the quality inspection of AM components was missing. To investigate the potential of the 3MA technology in this context, potential relations between micromagnetic properties and the porosity of AM components was investigated in the study described in https://doi.org/10.3390/ma17050971. In the study, 42CrMo4 samples were manufactured by PBF-LB/M with different process parameters. The samples were analyzed using a 3MA system and porosity values determined by image analysis of micrographs. Using multiple regression modeling, relations between the PBF-LB/M process parameters and six selected micromagnetic variables and relations between the process parameters and the porosity were assessed. The results reveal first insights into the use of micromagnetic NDT measurements for porosity assessment and process parameter optimization in PBF-LB/M-processed components.
This dataset provides the PBF-LB/M process parameter combinations, the results of the micromagnetic NDT measurements, and the porosity values which were used to develop the predictive models using a data-driven approach. Moreover, meta data about the experimental design, the sample manufacturing, the micromagnetic NDT measurements, the image capturing, and the porosity determination are given.
IMPORTANT: In case you use the data please cite our corresponding article https://doi.org/10.3390/ma17050971
License
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