Effect of high-dense electropulsing with different energies on the structure and strength of nickel cryorolled to different strains

The effect of thermomechanical treatment, based on combination isothermal cryorolling at liquid nitrogen temperature to strains ranging from 30 90 % and subsequent single electric pulsing with an integral current density Kj up 1.6 ×104 A2 s / mm4, the structure hardness initially coarse-grained pure nickel was studied. It is shown that considered treatment quite a powerful method control Ni strength through grain boundary design. right chose conditions cryogenic straining electro-heat action give ability high efficient production abnormally partially work-hardened sheets light tuning crystallite size fractions recrystallized grains angle boundaries, in particular, fine-grained sheet about 3 μm 50 fraction twin boundaries.