Correlation between microstructure, magnetic properties and mechanical behavior of the Permimphy alloy after high-pressure torsion

Authors: Dabou, O., Baudin, T., Brisset, F., Waeckerlé, T., Ateba Betanda, Y., Huang, Y., Helbert, A.L., Bradai, D. and Langdon, T.G.

Journal: Journal of Materials Science

eISSN: 1573-4803

ISSN: 0022-2461

DOI: 10.1007/s10853-024-09490-y

Abstract:

This study investigates the correlation between coercivity (Hc), grain size (d), and dislocation density in the Permimphy alloy (Fe–80%Ni–6%Mo). The samples used in this study were subjected to varying levels of applied strain through processing by high-pressure torsion. The microstructure and the magnetic coercivity were analyzed using a scanning electron microscope, electron backscatter diffraction and vibrating sample magnetometry. The grain size of the samples varied from 30 to 190 nm. This study demonstrated a strong correlation between Hc and microhardness when d > 3 µm. The results show that the coercivity of the Permimphy alloy follows an inverse V-shape with respect to grain size. The coercivity of the samples decreased despite increasing the dislocation density and the hardness when d < 3 µm. This phenomenon is attributed to the ferromagnetic exchange interaction across multiple grains and leads to the alignment of magnetic moments.

https://eprints.bournemouth.ac.uk/39497/

Source: Scopus

Correlation between microstructure, magnetic properties and mechanical behavior of the Permimphy alloy after high-pressure torsion

Authors: Dabou, O., Baudin, T., Brisset, F., Waeckerle, T., Ateba Betanda, Y., Huang, Y., Helbert, A.-L., Bradai, D. and Langdon, T.G.

Journal: JOURNAL OF MATERIALS SCIENCE

eISSN: 1573-4803

ISSN: 0022-2461

DOI: 10.1007/s10853-024-09490-y

https://eprints.bournemouth.ac.uk/39497/

Source: Web of Science (Lite)

Correlation between microstructure, magnetic properties and mechanical behavior of the Permimphy alloy after high-pressure torsion

Authors: Dabou, O., Baudin, T., Brisset, F., Waeckerlé, T., Betanda, Y.A., Huang, Y., Helbert, A.-L., Bradai, D. and Langdon, T.G.

Journal: Journal of Materials Science

Publisher: Springer Link

ISSN: 0022-2461

DOI: 10.1007/s10853-024-09490-y

Abstract:

This study investigates the correlation between coercivity (Hc), grain size (d), and dislocation density in the Permimphy alloy (Fe-80%Ni-6%Mo). The samples used in this study were subjected to varying levels of applied strain through processing by high-pressure torsion (HPT). The microstructure and the magnetic coercivity were analyzed using a scanning electron microscope (SEM), Electron Backscatter Diffraction (EBSD) and Vibrating Sample Magnetometry (VSM). The grain size of the samples varied from 30 μm to 190 nm. This study demonstrated a strong correlation between Hc and microhardness when d > 3 μm. The results show that the coercivity of the Permimphy alloy follows an inverse V-shape with respect to grain size. The coercivity of the samples decreased despite increasing the dislocation density and the hardness when d < 3 μm. This phenomenon is attributed to the ferromagnetic exchange interaction across multiple grains and leads to the alignment of magnetic moments.

https://eprints.bournemouth.ac.uk/39497/

Source: Manual

Correlation between microstructure, magnetic properties and mechanical behavior of the Permimphy alloy after high-pressure torsion

Authors: Dabou, O., Baudin, T., Brisset, F., Waeckerlé, T., Betanda, Y.A., Huang, Y., Helbert, A.-L., Bradai, D. and Langdon, T.G.

Journal: Journal of Materials Science

Publisher: Chapman & Hall

ISSN: 0022-2461

Abstract:

This study investigates the correlation between coercivity (Hc), grain size (d), and dislocation density in the Permimphy alloy (Fe-80%Ni-6%Mo). The samples used in this study were subjected to varying levels of applied strain through processing by high-pressure torsion (HPT). The microstructure and the magnetic coercivity were analyzed using a scanning electron microscope (SEM), Electron Backscatter Diffraction (EBSD) and Vibrating Sample Magnetometry (VSM). The grain size of the samples varied from 30 μm to 190 nm. This study demonstrated a strong correlation between Hc and microhardness when d > 3 μm. The results show that the coercivity of the Permimphy alloy follows an inverse V-shape with respect to grain size. The coercivity of the samples decreased despite increasing the dislocation density and the hardness when d < 3 μm. This phenomenon is attributed to the ferromagnetic exchange interaction across multiple grains and leads to the alignment of magnetic moments.

https://eprints.bournemouth.ac.uk/39497/

Source: BURO EPrints