Comparison of Direct and Indirect Structural Analysis of HAZ after Laser Cutting in Amorphous Alloys

K. Bána, M. Nagya, Zs. Fogarassyb, A. Szabóc aDepartment of Automotive Technologies, Budapest University of Technology and Economics, Stoczek street 6., 1111 Budapest, Hungary bInstitute of Technical Physics and Materials Science, Hungarian Academy of Sciences, Konkoly Thege Miklós út 29-33., 1121 Budapest, Hungary cInstitute of Engineering, University of Dunaújváros, Táncsics M. street 1/a, 2401 Dunaújváros, Hungary

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Heat affected zone (HAZ) of soft magnetic glassy alloys like METGLAS and FINEMET were examined after CO2 laser cutting. Our investigations were focused on the structural changes of the HAZ of these soft magnetic materials examined by microhardness distribution as indirect, and as direct methods (SEM and TEM). The comparison and validation of microhardness distribution with direct structural examinations were carried out. This has a certain connection to mechanical properties like embrittlement and magnetic properties. The soft magnetic glassy alloys may become the base materials for the iron core of electric motors in order to boost their efficiency. For this reason, it is essential to find the relevant cutting technology.

DOI:10.12693/APhysPolA.137.861 topics: laser cutting, FINEMET, METGLAS, microhardness, heat affected zone, crystallization, amorphous, nanocrystalline