Fracture and deformation properties of Ni–Fe superalloy in cryogenic high magnetic field environments Original Research Article

The present paper includes experimental and analytical data on the fracture properties of a nickel–iron superalloy, a ferromagnetic austenite, at 4 K in magnetic fields of 0 and 6 T. The tensile, notch tensile and small punch tests are employed. A finite element analysis is also performed to convert the experimentally measured load–displacement data into useful engineering information. To interpret the results we review the available theory of the influence of magnetic field on the stress intensity factor for a crack in ferromagnetic materials.