Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels

Non-oriented electrical steel sheets are applied as a core material in rotors and stators of electric machines in order to guide and magnify their magnetic flux density. Their contouring is often realized in a blanking process step, which results in plastic deformation of the cut edges and thus dete...

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Autores principales:	Lucas Boehm, Christoph Hartmann, Ines Gilch, Anett Stoecker, Rudolf Kawalla, Xuefei Wei, Gerhard Hirt, Martin Heller, Sandra Korte-Kerzel, Nora Leuning, Kay Hameyer, Wolfram Volk
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	grain size blanking electrical steel magnetic properties Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/719ba7e40c1d4de68994f9fa4af06303
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spelling	oai:doaj.org-article:719ba7e40c1d4de68994f9fa4af063032021-11-25T18:16:00ZGrain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels10.3390/ma142270551996-1944https://doaj.org/article/719ba7e40c1d4de68994f9fa4af063032021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7055https://doaj.org/toc/1996-1944Non-oriented electrical steel sheets are applied as a core material in rotors and stators of electric machines in order to guide and magnify their magnetic flux density. Their contouring is often realized in a blanking process step, which results in plastic deformation of the cut edges and thus deteriorates the magnetic properties of the base material. This work evaluates the influence of the material’s grain size on its iron losses after the blanking process. Samples for the single sheet test were blanked at different cutting clearances (15 µm–70 µm) from sheets with identical chemical composition (3.2 wt.% Si) but varying average grain size (28 µm–210 µm) and thickness (0.25 mm and 0.5 mm). Additionally, in situ measurements of blanking force and punch travel were carried out. Results show that blanking-related iron losses either increase for 0.25 mm thick sheets or decrease for 0.5 mm thick sheets with increasing grain size. Although this is partly in contradiction to previous research, it can be explained by the interplay of dislocation annihilation and transgranular fracturing. The paper thus contributes to a deeper understanding of the blanking process of coarse-grained, thin electrical steel sheets.Lucas BoehmChristoph HartmannInes GilchAnett StoeckerRudolf KawallaXuefei WeiGerhard HirtMartin HellerSandra Korte-KerzelNora LeuningKay HameyerWolfram VolkMDPI AGarticlegrain sizeblankingelectrical steelmagnetic propertiesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7055, p 7055 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	grain size blanking electrical steel magnetic properties Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	grain size blanking electrical steel magnetic properties Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Lucas Boehm Christoph Hartmann Ines Gilch Anett Stoecker Rudolf Kawalla Xuefei Wei Gerhard Hirt Martin Heller Sandra Korte-Kerzel Nora Leuning Kay Hameyer Wolfram Volk Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
description	Non-oriented electrical steel sheets are applied as a core material in rotors and stators of electric machines in order to guide and magnify their magnetic flux density. Their contouring is often realized in a blanking process step, which results in plastic deformation of the cut edges and thus deteriorates the magnetic properties of the base material. This work evaluates the influence of the material’s grain size on its iron losses after the blanking process. Samples for the single sheet test were blanked at different cutting clearances (15 µm–70 µm) from sheets with identical chemical composition (3.2 wt.% Si) but varying average grain size (28 µm–210 µm) and thickness (0.25 mm and 0.5 mm). Additionally, in situ measurements of blanking force and punch travel were carried out. Results show that blanking-related iron losses either increase for 0.25 mm thick sheets or decrease for 0.5 mm thick sheets with increasing grain size. Although this is partly in contradiction to previous research, it can be explained by the interplay of dislocation annihilation and transgranular fracturing. The paper thus contributes to a deeper understanding of the blanking process of coarse-grained, thin electrical steel sheets.
format	article
author	Lucas Boehm Christoph Hartmann Ines Gilch Anett Stoecker Rudolf Kawalla Xuefei Wei Gerhard Hirt Martin Heller Sandra Korte-Kerzel Nora Leuning Kay Hameyer Wolfram Volk
author_facet	Lucas Boehm Christoph Hartmann Ines Gilch Anett Stoecker Rudolf Kawalla Xuefei Wei Gerhard Hirt Martin Heller Sandra Korte-Kerzel Nora Leuning Kay Hameyer Wolfram Volk
author_sort	Lucas Boehm
title	Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
title_short	Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
title_full	Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
title_fullStr	Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
title_full_unstemmed	Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels
title_sort	grain size influence on the magnetic property deterioration of blanked non-oriented electrical steels
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/719ba7e40c1d4de68994f9fa4af06303
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Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels

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