Micromagnetic measurement of the surface layer state in hard turned 51CrV4 steel

Description of the dataset:

This data set contains measurement data from a micromagentic sensor that allows for non-destructive, in-process material characterization of the mechanical properties of ferromagnetic components. It contains 82 features that were measured using a MM sensor as input variables and corresponding reference measurements of the residual stress and hardness as outputs.

The parts that were measured are from hard turning experiments of quenched and tempered (Q&T) steel 51CrV4 in different initial surface hardness levels, i. e. 400 HV30, 500 HV30 and 600 HV30. For details on the manufacturing process, please refer to https://doi.org/10.48662/daks-69.

The MM measurements were carried out using a 3MA-II device from Fraunhofer IZFP. The sensor utilizes four measurement methods: Barkhausen noise, incremental permeability, multi-frequency Eddy current analysis and harmonic analysis of the tangential magnetic field strength, resulting in 41 features that are extracted from the measurement curves. The data set includes 81 data points with 82 input variables. By using two different magnetization amplitudes, 82 input variables are available.

As output variables the surface hardness is available and two characteristic values for the near surface residual stress state: the residual stress on the surface, i.e. at depth 0 micrometer and the maximum compressive residual stress. These values where extracted from the residual stress depth profiles. The residual stress was measured with X-ray diffraction, using a Pulstec μ-X360 diffractometer. Post process Vickers hardness testing was carried out using a Struers DuraScan-70 system.

The supplied .csv contains 82 columns with features from the MM measurements and 3 columns with the reference measurements: ES1 (surface residual stress), ES2 (maximum compressive residual stress) and HV (surface hardness). The Readme.txt contains further details about the data set.

For more details on the sensor and the experimental setup, please refer to [1].

[1] Thomas Wegener, Alexander Liehr, Artjom Bolender, Sebastian Degener, Felix Wittich, Andreas Kroll & Thomas Niendorf, "Calibration and validation of micromagnetic data for non-destructive analysis of near-surface properties after hard turning" in HTM Journal of Heat Treatment and Materials, 2022, 77(2), 156-172.