Study ofα<->γTransformation in Two-Phase Iron-Nickel Alloys by Thermomagnetic Measurements

摘要

Theα<->γtransformation was studied by thermomagnetic measurements in the two-phase (αandγ) region of Fe-Ni alloys. The Fe_(96)Ni_4 and Fe_(90)Ni_(10) samples were prepared by melt quenching and cold-rolling. A typical hysteresis phenomenon in the phase transformation was found in all alloys but the sample preparation had no influence on the character of thermomagnetic curves even if low temperature saturation magnetization data indicated a higher amount of retainedγ-phase in the melt-quenched alloys. The hysteresis depends on the Ni content and on the maximum of temperature reached during heating.