Effect of stress on the law of approach to saturation magnetizationin carbon steels |
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Authors: | Utsunomiya T Nishizawa H Kaneta K |
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Affiliation: | Dept. of Archit. Eng., Kyoto Univ.; |
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Abstract: | In high fields where the magnetization is approaching saturation, the resolved magnetic polarization I can be expressed by a power series of the inverse of external field H as: I=Is-b/H 2-c/H3 . . ., or alternatively in terms of the reversible permeability μrev=1+(2b/H3+3c/H4+ . . .)/μ0 where Is is the spontaneous magnetic polarization and b, c, are constants. These equations express the law of approach to saturation magnetization. The coefficient b for a cubic crystal has been deduced as b=0.0762/IsK+1.5(λ100-λ 111)σ]2, where σ is the applied stress and others are magnetic constants. The values of reversible permeability μrev under biasing field H were measured for carbon steels with applied stresses. The results showed that the square root of 2b changed linearly with the applied stress, The values of magnetic constant K andλ100 -λ111 were calculated, They agreed with the standard values, but were affected by chemical composition and heat treatment of materials, especially in λ100-λ111 |
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