The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on the structural properties of the two iron-based metallic glasses Fe 73.9Cu 1Nb 3Si 15.5B 6.6 and Fe 81.2Co 4Si 0.5B 9.5P 4Cu 0.8 have been investigated and compared. While for Fe 73.9Cu 1Nb 3Si 15.5B 6.6, HPT processing allows us to extend the known consolidation and deformation ranges, HPT processing of Fe 81.2Co 4Si 0.5B 9.5P 4Cu 0.8 for the first time ever achieves consolidation and deformation with a minimum number of cracks. Using numerous analyses such as X-ray diffraction, dynamic mechanical analyses, and differential scanning calorimetry, as well as optical and transmission electron microscopy, clearly reveals that Fe 81.2Co 4Si 0.5B 9.5P 4Cu 0.8 exhibits HPT-induced crystallization phenomena, while Fe 73.9Cu 1Nb 3Si 15.5B 6.6 does not crystallize even at the highest HPT-deformation degrees applied. The reasons for these findings are discussed in terms of differences in the deformation energies expended, and the number and composition of the individual crystalline phases formed. The results appear promising for obtaining improved magnetic properties of glassy alloys without additional thermal treatment.
|Publikationsstatus||Veröffentlicht - 1 Feb. 2023|
Bibliographische NotizFunding Information:
We would like to thank the European Research Council, Grant ERC-2013-ADG-340025 for their support and cooperation. Funding from the Austrian Academy of Sciences via the Innovation Fund project IF 2019–37 is gratefully acknowledged. We acknowledge CzechNanoLab Research Infrastructure supported by MEYS CR (LM2018110). P.R. would like to acknowledge project no. 2020-4.1.1-TKP2020 supported by the Ministry of Innovation and Technology of Hungary via the National Research, Development, and Innovation Fund, financed under the TKP 2020 funding scheme.
© 2023 by the authors.