Journal of Advanced Materials in Engineering

Journal of Advanced Materials in Engineering

Development of Vicalloy I Ultrathin Foils with Mo Addition Focusing on the Improvement of Magnetic Properties

Document Type : Original Article

Authors
M. Kamali-Ardakani
S. Hasani
A.R. Mashreghi
Department of Mining and Metallurgical Engineering, Yazd University, 89195-741 Yazd, Iran
10.47176/jame.42.4.1041
Abstract
In this study, the effect of addition of molybdenum as a ferrite phase stabilizer to Vicalloy I was investigated for enhancing its magnetic properties. Initially, an alloy with a composition of 45Fe-45Co-9V-1Mo was cast. The cast alloy was subjected to homogenization at a constant temperature of 1200 ºC for various times to examine the influence of homogenization time. The results indicated that a completely homogeneous structure with an average grain size of 306.48 µm was obtained after homogenization for 10 hours. Furthermore, homogenized samples were subjected to hot and cold rolling processes to produce ultrathin foils of this alloy, resulting in thickness reduction of 83% and 81.5%, respectively, and ultimately yielding foils with a thickness of 180 μm. Phase analysis revealed that while the hot and cold rolling processes did not induce phase changes, the magnetic properties was influenced. Specially, the saturation magnetization increased from 169.94 emu/g in the cast sample to 190.33 emu/g in the cold-rolled sample. Additionally, the coercive force increased by 10 Oe after homogenization due to the formation of a martensitic phase, but decreased again after cold rolling due to the changes in the texture components.
Keywords
Vicalloy
Homogenizing
Ultrathin foils
Magnetic properties
Saturation magnetization
Subjects
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Journal of Advanced Materials in Engineering
Volume 42, Issue 4
Winter 2024
Pages 1-12

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