The structure and magnetic properties of a heat-resistant nickel-base alloy after a high-temperature deformation

Application of Magnetic Methods to the Study of the Strain State of Nickel-Based Superalloys

“…The initial sample has a low value of magnetic susceptibility,  = 410 -4 . Our previous studies showed that in turbine blade areas with a high stress level there is an increase in magnetic susceptibility by two orders of magnitude during operation under forced conditions [5][6]. In our case, the values of magnetic susceptibility in the blade airfoil change from 2010 to 60010 -4 (increase during operation).…”

“…All the cases of deformation-induced ferromagnetism reported in the literature are associated with cold deformation (e.g., cold rolling). It was previously shown by the authors of this work that strain-induced magnetism may occur after high-temperature deformation [5,6].…”

“…The formation of a stable defect complex inside the '-phase indicates the softening of the intermetallic phase [10]. Planar structural defects may change the atomic positions in the intermetallic crystal lattice and promote a "cluster", a volume structural defect with ferromagnetic ordering [5].…”

Study of magnetic properties and structural and phase transformations in the Co-19 at % Al-6 at % W alloy

“…Service characteristics of soft magnetic materials can differ depending on the kind of devices in which they are used [5]. For materials used in transformers, the low area of the hysteresis loop (Н c ≤ 1 Oe) is a significant parameter.…”

“…These alloys are considered to be promising as heat resistant materials and to have strength properties competitive with those of nickel alloys [1][2][3][4][5]. In contrast to heat resistant nickel alloys, which are paramagnetic over the whole range of operating temperatures, the heat resistant cobalt alloys are ferromagnetic [4,5].…”