Weak magnetic fields influence on microhardness of polycrystalline aluminum

Weak magnetic fields ($B\leqslant 300$ mT) influence on microhardness of polycrystalline aluminum is studied experimentally. It is shown that microhardness of aluminum linearly depends on an induction of a magnetic field. Dependence of microhardness on release time in a magnetic field is determined and saturation of microhardness is revealed under attainment of certain release time.