期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 790, 期 -, 页码 529-535出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.03.213
关键词
Amorphous alloys; Magnetization; Mechanical properties; Microstructure
资金
- National Natural Science Foundation of China [51571115]
- Six Talent Peaks Project of Jiangsu Province, China [2015-XCL-007]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Fe-based amorphous alloys with excellent soft magnetic properties always suffer catastrophic annealing embrittlement. The soft magnetic and mechanical properties of a series of Fe84.3-xCoxSi2B13Cu0.7 (x = 0, 2, 4, 6, 8) amorphous alloy ribbons were investigated. With appropriate substitution of Co for Fe, the B-s of the alloys shows a slight increase and the H-c remains at a low level. From two-point bending tests, a sharp transition from ductility to brittleness can be observed upon annealing. The embrittlement can be attributed to localized shear bands due to shear bands branching during deformation. It is found that the ductile-brittle transition temperature increases slightly by applying cryogenic thermal cycling treatment to annealed ribbons, indicating that the annealing embrittlement can be improved to some extent by cryogenic thermal cycling treatment. According to nanoindentation results, the increased shear transformation zone volume is responsible for the bending ductility increment. Ultimately, a ductile Fe80.3Co4Si2B13Cu0.7 amorphous alloy ribbons with a B-s of 1.68 T and a H-c of 4.8 A/m were obtained by cryogenic thermal cycling treatment after annealing. (C) 2019 Elsevier B.V. All rights reserved.
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