Abstract
The repeated roll bending process was carried out on AZ31 magnesium alloy sheet to improve formability at room temperature. Influences of applied bending strain per pass by roll bending process on mechanical property and formability were investigated changing pushing amount of upper bending roll. The larger applied bending strain per pass was effective to increase hardness at the surface of the sheet, due to additional shear deformation. Although the hardness after repeated roll bending and subsequent annealing at 400 ℃ for 1hour was lower than that of initial sheet, the tensile strength is almost same for the initial sheet. The Eriksen value was increased by roll bending process and subsequent annealing with little decreasing the strength of the sheet.
