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Relative effect(s) of texture and grain size on magnetic properties in a low silicon non-grain oriented electrical steel
Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
R&D Division, Crompton Greaves Ltd.
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2003 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 264, no 1, p. 75-85Article in journal (Refereed) Published
Abstract [en]

Hot rolled low Si (silicon) non-grain oriented electrical steel was cold rolled to different reductions. Cold rolled material was subsequently recrystallized, 650°C and 2 h, and then temper rolled (to 7% reduction) for the final grain growth annealing and decarburization treatment at 850°C for 2–24 h. The development of texture, grainsizeandmagneticproperties were characterized at different stages of processing. Effect of textureonmagneticproperties (watt loss and permeability) was observed to be best represented by the ratio of volume fractions of (111)〈uvw〉/(001)〈uvw〉 fibers, as estimated by convoluting X-ray ODFs (orientation distribution functions) with respective model functions. Such a ratio was termed as generalized texture factor (tf) for the non-grain oriented electrical steel. An effort was made to delink effects of grainsizeandtexture, as represented by respective tf, on watt loss and permeability by careful analysis of experimental data. In general, low tf and/or high grainsize were responsible for low watt loss and high permeability. However, individual effect of grainsize or tf onmagneticproperties was less significant at low tf or large grainsize, respectively. An attempt was made to fit regression equations, namely—linear, exponential and power, relating magneticproperties with tf andgrainsize, limiting the fitting parameters to 3. Least standard deviations, between experimental and predicted values, were obtained by power regression equations for both magneticproperties.

Place, publisher, year, edition, pages
2003. Vol. 264, no 1, p. 75-85
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URN: urn:nbn:se:ltu:diva-6159DOI: 10.1016/S0304-8853(03)00142-2Local ID: 45cc1555-ca76-42b3-baf1-72a4aad2de55OAI: oai:DiVA.org:ltu-6159DiVA, id: diva2:979036
Note
Upprättat; 2012; 20120925 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-05-28Bibliographically approved

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Nurni, Viswanathan

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