Abstract
Iron single crystals with various tensile axes near the [100]–[110] line were extended in the temperature range 153°K to 473°K. The crystals which had their tensile axis within about 10 degrees from the [100] axis showed large work-hardening at low temperatures and the crystals with other orientations showed small work-hardening. It was confirmed from the rotations of tensile axis that four slip systems operated in the [100] type crystals and two systems in the [110] type crystals at low temperatures. At high temperature (473°K), the [100] type crystals showed long and linear work-hardening in the latter stage of deformation and large elongations more than 100%, but the crystals near the [110] axis showed small work-hardening in the latter stage and also small elongations.