Microdeformation Processes in Soft Magnetic Compounds
R. Bidulskýa, J. Bidulská a, P. Petroušek a, A. Fedoriková a, E. Dudrová b, and M. Actis Grande c
aTechnical University of Košice, Faculty of Metallurgy, Institute of Materials, Letná 9, 042 00 Košice, Slovakia
bInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 45, 040 01 Košice, Slovakia
cDepartment of Applied Science and Technology, Politecnico di Torino, Viale Teresa Michel, 5, 15121, Alessandria, Italy
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Porosity can be defined in different ways. The most frequently used definition is the total porosity, which is the total volume fraction of empty space in the specimen. The presence of pores strongly affects the fracture mode. Besides the evaluation of geometry and quality of connections, fractographic analysis enables a quantification of the important microstructural characteristics of the plane porosity. This quantity allows to quantify the existing relations between microstructure and properties. The fractographic evaluation of the distribution of microdeformation processes in the volume of experimental material demonstrates the influence of porosity on the concentration of deformation flows into the microvolume of connections. Plain porosity contributes to the recognition of critical microstructural defects and therefore, to enable evaluating the relationship between the processing parameters, microstructural constituents, and pores. In the fractography evaluation, the analysis of the quality of interparticle bonding using determination of elementary types of fracture facets allows to interpret the mechanical and plastic properties of investigated materials.

DOI: 10.12693/APhysPolA.131.1367
PACS numbers: 75.50.-y, 81.20.Ev, 81.40.Np