In order to clarify the order-disorder transformation mechanism of the hot-rolled 2V Permendur sheet, the characteristics of various heat-treated specimens were investigated with regard to their roll directions.
The results obtained in this study can be summarized as follows:
(1) The magnetostriction is dependent upon the roll directon, and shows its maximum value at the angle 45° except in the furnace-cooled state from 1050°C.
(2) The magnetostriction
vs. heat-treatment curves at
H=1600 Oe are almost similar in any direction. The magnetostriction becomes largest after furnace cooling 1050°C, and decreases to the minimum after water quenching at 680°C, but increases at 750°C, then decreases again at 850°C and shows the tendency of slight increase at higher temperatures. These tendencies do not change at
H=50 Oe, although the magnetostriction shows again the minimum at 950°C.
(3) The intensity curves of magnetization
vs. roll direction at
H=50 Oe after various heat-treatments are found to be analogous to those for magnetostriction.
(4) Young's modulus in γ phase is dependent upon the roll direction.
(5) The effects of roll direction on Young's modulus in an ordered state are quite different from those in a disordered state, and Young's modulus in the former is generally larger than that in the latter.
(6) In (α+γ) phase, Young's modulus is largest after a water quenching at 950°C.
(7) Young's modules
vs. heat-treatment curves are much the same in all directions.
(8) The cooling effect due to quenching is pronounced rather in cold water than in liquid nitrogen.
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