1Department of Metallurgy, Faculty of Engineering, Hokkaido University, Sapporo
The behavior of plastic anisotropy of magnesium sheet, and the relation between R value and earing of magnesium sheet were examined at elevated temperatures. The results are as follows.
(1) R values increase as non-basal slip becomes active. Therefore, they increase with the angle between the tensile axis and the rolling direction, the tensile elongation, and the testing temperature.
(2) Eearing occurs in the rolling direction, where R value is minimum. This result is explained from the relation between the parameters specifying the state of anisotropy and earing.
(3) No correlation is observed between ear height and R coefficient, (Rmax-Rmin)/Raverage, i.e. the latter decreases as the testing temperature is increased, but the former does not change.
Please do not copy without permission.