Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 417, Issue -, Pages 42-48Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2016.05.049
Keywords
Electrical steel; Hysteresis; Mechanical stress; Plastic deformations
Funding
- DFG
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The magnetic properties of non-grain-oriented (NGO) electrical steels are highly susceptible to mechanical stresses, i.e., residual, external or thermal ones. For rotating electrical machines, mechanical stresses are inevitable and originate from different sources, e.g., material processing, machine manufacturing and operating conditions. The efficiency and specific losses are largely altered by different mechanical stress states. In this paper the effect of tensile stresses and plastic deformations on the magnetic properties of a 2.9 wt% Si electrical steel are studied. Particular attention is paid to the effect of magnetic anisotropy, i.e., the influence of the direction of applied mechanical stress with respect to the rolling direction. Due to mechanical stress, the induced anisotropy has to be evaluated as it is related to the stress-dependent magnetostriction constant and the grain alignment. (C) 2016 Elsevier B.V. All rights reserved.
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