Electrical current process was used in the thin plate metals and the fine wires because of its higher efficiency (rapidly recrystallization) and the advantage of avoiding oxidation without inert gas. This study investigated the transformation of twin structure and mechanical properties of 304 stainless steel after electrical current test by direct current. The results showed the microstructure of matrix transported from preferred structure to equiaxed grains and a few annealed twins with increasing the current density from 32 to 188J. The hardness of matrix remained stable under 83J because of the number of twins increased, and the tensile properties were similar to the wire using furnace heating. After electrical current test at 188J, the strain hardening exponent of wires was 0.44, was suitable to be used for cold work procedure.

Effect of the Twins on Mechanical Properties of AISI 304 Stainless Steel Wire Using Electrical Current Method. H.C.Chuang, F.Y.Hung, T.S.Lui, L.H.Chen: Materials Transactions, 2011, 52[1], 25-30