The cyclic deformation behaviour of Mg-base alloy AZ31

The cyclic deformation behaviour of Mg - base alloy AZ31 was investigated i n stress controlled tension-, compression-tests. Experiments with zero mean stress (R = -1) as well as with tensile or compression mean stress (R = 0, R = - infinity reap.) were carried out. Cyclic strain hardening and a pron ounced anisotropy of strength during the first loading cycles was observed with higher yield strength in tension compared with compression. Consequent ly, in tests with zero mean stress cyclic creep and compressive mean strain s occured.