Non-destructive hardness prediction for 18CrNiMo7-6 steel based on feature selection and fusion of Magnetic Barkhausen Noise

Different features of Magnetic Barkhausen Noise (MBN) represent distinctive characteristics of material stress states, microstructures and domain wall (DW) behaviors. However, a group of features could be selected and fused for the evaluation of specific characters such as hardness and stress. This paper analyzes multiple features of MBN and their reflections on different material and health status influences and proposes a new feature selection...