The mechanical properties of the ECA
pressed specimens—the Vickers microhardness and the tensile
properties—were measured at room temperature. The
microhardness was measured on the transverse cross-section
under a pre-load of 150 gf applied for 15 s. For the tensile
testing, cylindrical specimens of 10mm in the gage length
and 3mm in the gage diameter were machined from the center
portions of the ECA pressed rods, and the testing was conducted at a nominal strain rate of 2×10−3 s−1 under a
constant cross-head speed