Microdeformation Processes in Soft Magnetic Compounds

Bidulský, Róbert; Bidulská, Jana; Petroušek, Patrik; Fedoriková, Alica; Dudrová, E.; Grande, Marco Actis

doi:10.12693/aphyspola.131.1367

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…the evaluation procedure described in more detail is at work [5,6]. From our previous studies [15][16][17], it´s known that nanopores do not affect the mechanism of fracture formation. Therefore, only pores of a size greater than 1 μm were investigated.…”

Section: Methodsmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Bidulský,

Petroušek,

Bidulská

et al. 2021

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The main aim of the present paper is to evaluate the porosity and mechanical properties of Ti6Al4v and CoCrW alloys produced by Laser Powder Bed Fusion (L-PBF) as an additive manufacturing (AM) technology. Ti6Al4v and CoCrW alloys are attractive for medical application. the complex examination of porosity for these alloys needs the quantification of morphological and dimensional characteristics. Quantification of porosity was realized on non-etched samples. Quantitative image analysis was used to describe the dimensional and morphological porosity characteristics. the pores were evaluated by image pro plus software. the results show the significant inhomogeneity of the morphology and distribution, as well as the pore size in the investigated materials and underline the importance of pore structure for the controlling mechanism of the mechanical response.

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Section: Methodsmentioning

confidence: 99%

“…on the other side, the poor fatigue and wear resistance in additively manufactured titanium alloys is caused by high porosity levels. there have been multiple types of porosity observed in these materials [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Bidulský,

Petroušek,

Bidulská

et al. 2021

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“…All these have characteristic fracture resistance properties resulting in combinations of dimple rupture, cleavage, and intergranular and interparticle failure micromechanisms. Based on the criteria of previous studies (see [28,29]), the fracture surfaces of AM 316L samples were evaluated. Ten SEM images at 3000× magnification of the fracture surface of each sample were analyzed via the image analysis software (Image J) to calculate the fraction of dimples showing coalescence.…”

Section: Methodsmentioning

confidence: 99%

Case Study of the Tensile Fracture Investigation of Additive Manufactured Austenitic Stainless Steels Treated at Cryogenic Conditions

Bidulský

Bidulská

Gobber³

et al. 2020

Materials

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Additive manufacturing is a key enabling technology in the manufacture of highly complex shapes, having very few geometric limitations compared to traditional manufacturing processes. The present paper aims at investigating mechanical properties at cryogenic temperatures for a 316L austenitic stainless steel, due to the wide possible cryogenic applications such as liquid gas confinement or superconductors. The starting powders have been processed by laser powder bed fusion (LPBF) and tested in the as-built conditions and after stress relieving treatments. Mechanical properties at 298, 77 and 4.2 K from tensile testing are presented together with fracture surfaces investigated by field emission scanning electron microscopy. The results show that high tensile strength at cryogenic temperature is characteristic for all samples, with ultimate tensile strength as high as 1246 MPa at 4.2 K and 55% maximum total elongation at 77 K. This study can constitute a solid basis for investigating 316L components by LPBF for specific applications in cryogenic conditions.

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“…Low magnetic losses reduce heat generation and energy consumption. Mechanical properties affect shearability, resistance to fatigue fracture resulting from sudden changes in mechanical stress and resistance to material deformation at high rotor or stator speeds [3][4][5]. The chemical composition of these steels is similarespecially as far as the basic alloying elements are concerned, and the manufacturing processes have not changed significantly for years.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Shear Gap Size on the Quality of the Sheared Surface in Electrical Steel Sheet Blanking

Spišák

Majerníková²,

Kaščák³

et al. 2020

Acta Metall Slovaca

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The quality of the sheared surface when blanking, also known as die-cutting, is the result of several factors. Based on current knowledge about blanking, the following technological parameters – shear gap size, blunting of the shearing tool, lubrication in the shearing process, and deformation rate – can be considered as decisive parameters on the quality of the sheared surface. The main material characteristics include yield strength, tensile strength, ductility, and ferrite grain size. The paper is focused on the influence of the shear gap on the quality of the shear surface of electrical sheets with different chemical composition and different mechanical properties. The quality of the cutting surface was characterized by the size of the plastic cutting area. The relationships between the size of the shear gap, which ranged from 1 to 7% of the thickness of the cut material and the size of the plastic shear area, were evaluated and measured macroscopically.

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Microdeformation Processes in Soft Magnetic Compounds

Cited by 3 publications

References 11 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Case Study of the Tensile Fracture Investigation of Additive Manufactured Austenitic Stainless Steels Treated at Cryogenic Conditions

The Impact of Shear Gap Size on the Quality of the Sheared Surface in Electrical Steel Sheet Blanking

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