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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Production of Fe-6.9 wt%Ti alloy sheets for application in electric machines: Physical properties characterization

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Author(s):
Fulop, G. O. [1] ; Bormio-Nunes, C. [1]
Total Authors: 2
Affiliation:
[1] Univ Sao Paulo, Lorena Sch Engn, BR-12602810 Lorena - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Magnetism and Magnetic Materials; v. 539, DEC 1 2021.
Web of Science Citations: 0
Abstract

Early structural damage and resulting failures can be caused by vibration in AC electrical machines. Since the stator is under a magnetic field that varies with time, the stator magnetic material contracts and expands due to the magnetostriction, producing noise and vibration. Therefore, a low magnetostriction value is desirable to minimize the effect of vibration and avoid earlier motor breakdowns. However, not only a low magnetostriction value is enough. Low values of magnetic losses avoid the material heating, consequently preventing magnetic properties degradation. To minimize these magnetic losses, a suitable material might have high resistivity and magnetic permeability, and also low coercive field. Fe-Ti alloys have low magnetostriction values and are soft magnetic material, making them good candidates for using in motors' stators. In the present work, two Fe-Ti alloys with composition 6.9 wt% Ti (8 at.%) were studied. One of the alloys was studied after the as cast ingot annealing at 1200 degrees C. The other alloy was hot rolled from 7 mm down to 0.5 mm of thickness. The maximum magnetic induction of the rolled alloy was 1.74 T, about 12% higher than the not rolled one. In addition, the rolled Fe-Ti alloy magnetostriction is lower than 1 ppm up to 1.25 T, while in the not rolled condition is also 1 ppm, but only up to 0.75 T. (AU)

FAPESP's process: 17/26386-3 - High Entropy alloys based on Fe, Co and Ni: Production and Study of Magnetic Properties.
Grantee:Cristina Bormio Nunes
Support Opportunities: Regular Research Grants
FAPESP's process: 18/14939-0 - Production of Fe-Ti alloy sheets and improvement of their magnetic and microstructural properties for use in low-noise electric machines and transformers
Grantee:Guilherme Origo Fulop
Support Opportunities: Scholarships in Brazil - Doctorate