Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
63 (1988), S. 2977-2979
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Experimental alloys containing between 0.03 and 0.67 wt. % nickel were produced to determine the effect of low nickel content on the ac magnetic properties of Carpenter's 49Fe-49Co-2V Hiperco (a registered trademark of Carpenter Technology Corp.) 50A alloy. The alloys were processed into 1.02×10−4 m (0.004 in.) thick strip, wound into tape toroids, annealed then tested for core loss at 60 and 400 Hz for induction levels of 1.0, 1.5, and 2.0 T. Toroids annealed at 885 °C in hydrogen, followed by slow cooling, exhibited a linear increase in core loss as nickel content increased due to the presence of a second phase in the microstructure. When the annealing temperature was decreased to 845 °C the second phase was eliminated and the core loss did not vary with nickel content. STEM examination of the samples determined that the second phase was a heavily dislocated bcc α'1 phase which had martensitically transformed from the fcc γ1 phase despite the slow cooling rate. Thermal expansion testing determined that increasing the Ni content in the range of 0–1 wt. % decreased the α1 +γ1 /α1 transformation temperature of the 49Fe-49Co-2V alloy.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340920
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