Schrage, O.Dardaei Joghan, H.Hahn, M.Tekkaya, A. E.Korkolis, Y. P.2025-09-162025-09-162025-08-26http://hdl.handle.net/2003/4392910.17877/DE290R-25697High-speed blanking induces a shear localization in high-strength steels, improving the quality of the blanked edge in terms of geometrical shape, separation surface roughness, and shear-influenced zone close to the cut edge. High-speed blanking experiments with a 20 mm punch diameter and 8 m/s velocity of 2 mm thick 22MnB5-sheets (ultimate tensile strength of 1550 MPa) utilizing a relative clearance of 2.5 % are carried out. Two types of shear bands are observed in the post-process: A 'deformation shear band,' characterized by elongated grains in shear direction, is distinguished from a ‘transformation shear band’ with a change in microstructure appearing as a white layer in optical microscopy. Previous investigations by transmission electron microscopy showed that this white layer consists of nanosized grains in 22MnB5 material. Light microscopic images show that the transfor mation shear band width varies over the sheet thickness. Independent of the occurrence of a transformation shear band, a localization with a width of less than 20 µm is observed along the blanked edge. Fractographic analysis by scanning electron microscopy shows no evi dence of brittle fracture. Characteristic areas of the separation surfaces coincide with the observed two types of shear bands at the blanked edgeenHigh-speed blankingMicrostructureHigh-strength steelsShear localization620670ConferencePaperMangan-Bor-StahlStanzenFormhärtenScherungFraktographieZerstörungsfreie WerkstoffprüfungRasterelektronenmikroskopMikrostruktur