Abstract
Compression tests were made at -196 to 200℃ using specimens from 5083-O sheets in the longitudinal, long transverse and short transverse directions. α(=b/a) (ratio of lengths of the minor axis(b) to the major axis(a) on the elliptical cross section of the middle of specimens during compressive testing) is the value showing anisotropy of specimens. A linear relation lies between α value and r'valur on the compressive testing which is similar to the r value on the tensile testing.
