A critical study of the Jiles and Atherton Mean Field Model was done to determine the validity of the model, a tool in describing and understanding the magnetization process in textured silicon steels. / Hysteresis loops were generated using an Epstein apparatus in various directions with respect to the rolling direction and for various external magnetic fields. Techniques were then used to obtain the model parameters, namely a$ sp prime,$ $ alpha sp prime,$ and k$ sp prime.$ After creating a new version of the model, M$ sb{ rm s}$ was also obtained from the data hysteresis loops. / The model gives a close description of the influence of texture on hysteresis behaviour and predicts the variation of the parameter k$ sp prime,$ which agrees with our understanding of the role of texture in changing the parameter. We have observed that the highest value of this parameter coincides with the angles at which it is most difficult to magnetize the specimen. / The proposal of the model's creators that the main drawback of the model that the pinning parameter $k sp prime$ is not constant, is not justified by them and not supported by our analysis of experimental data.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.59284 |
| Date | January 1990 |
| Creators | Kozina, Thomas |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mining and Metallurgical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001071887, proquestno: AAIMM63488, Theses scanned by UMI/ProQuest. |
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