Effect of magnetic fields on the formation of the neck of a flat aluminum sample with inclusions during stretching

The present study investigates the effect of a constant magnetic field (MF) on the destruction of an aluminum alloy containing ferromagnetic inclusions in the creep regime. The authors found that preliminary exposure (before mechanical load P = 150 … 160 N) of aluminum alloy to a constant MF (with induction B up to 0.7 T and exposure time of at least 30 min) increases the alloy creep (up to 20%) and changes the nature of the formation of a zone of intense plastic deformation (“neck”). The authors associate the observed changes with an increasing role of internal mechanical stresses due to the strong magnetostriction of inclusions.