Production of Fe-Ti alloy sheets and improvement of their magnetic and microstructural properties for use in low-noise electric machines and transformers

• Grant number: 18/14939-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2018
• End date: March 31, 2022
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Cristina Bormio Nunes
• Grantee: Guilherme Origo Fulop
• Host Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil

Abstract

In the present work, the optimization of the magnetic properties of the Fe-4Ti alloy in the form of thin sheets is sought. In the study carried out in the master's degree of the same student this material was found to be very promising. The promising application would be in the construction of magnetic cores for use of low nois electric machines and transformers, since it has lower magnetostriction compared to electrical steels. The longitudinal magnetostriction of Fe-4Ti alloy is -9 ppm, whereas for the oriented grain electric steel (GO) is 19 ppm. In addition, the initial permeability of the Fe-Ti alloy is 2680 and 870 for GO electric steel. It is an inedited subject and of interest, since it may be a material of the future for use in electric machines and transformers that demand low noise, taking into account environmental constraints, which have become more severe, nowadays. Furthermore, the evaluation of the properties of the Fe-6,9Ti alloy (wt %), which is the alloy in the Fe-Ti system, which has null magnetostriction, is also of interest and has never been performed. In this case, due to the greater amount of Ti, the properties of mechanical conformation may be a limitation, and this will be determined. Fe-4Ti alloy will be obtained in the form of thin plates, with the objective of obtaining the abnormal grain growth and also obtaining Goss-like texture. This is expected to further increase the magnetic permeability of the material and decrease the coercive field, thereby decreasing hysteretic material losses. The material will also be obtained with non-oriented grains (GNO) and compared to the electric steel GNO. The exploratory study of the Fe-6,9Ti alloy aims to evaluate the basic magnetic properties of this material and to evaluate its mechanical conformability. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FULOP, G. O.; BORMIO-NUNES, C.. Production of Fe-6.9 wt%Ti alloy sheets for application in electric machines: Physical properties characterization. Journal of Magnetism and Magnetic Materials, v. 539, DEC 1 2021. (17/26386-3, 18/14939-0)

FULOP, G. O.; DIAS, M. B. S.; SANDIM, H. R. Z.; BORMIO-NUNES, C.. High saturation magnetic induction and low magnetostriction of a novel ferritic Fe-Ti alloy compared to a non-oriented silicon steel. Journal of Magnetism and Magnetic Materials, v. 527, JUN 1 2021. (15/25461-6, 18/14939-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

FULOP, Guilherme Origo. Production of Fe-Ti alloys thin sheets and the improovement of its magnetic and microstructural properties for application in electric machines and low noise power transformers. 2022. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL/ASDI) Lorena.