The effect of annealing at low temperatures on the plasticity of permalloys
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During vacuum annealing and with a holding time of one hour the elongation per unit length increases considerably up to 800° C. On increasing temperatures up to 1100° C, elongation per unit length does not change even with a threehour holding period.
The hardness of specimens decreases with a rise in temperature and an extension of the holding period at 1100° C; the hardness of specimens is lowered by a factor of about two in comparison with that of specimens tested as delivered.
In comparison with vacuum annealing within the same temperature range, holding time, and cooling rate, Black annealing produces a fairly low elongation per unit length.
KeywordsCool Rate Unit Length Vacuum Annealing
- 1.G. Finke, Metallische weichmagnetische Wekstoffe fuer hohe Elektrotechnik, Elektro-Anz., Vol. 12, No. 39–40, 1959.Google Scholar