Effects of Biaxial Stress Condition for Fatigue Properties of Magnesium Alloy
Fatigue crack propagation tests of magnesium alloy were conducted under conditions of biaxial and uniaxial loading by using a cruciform specimen with the biaxial fatigue tester. The purpose of this study is to investigate the effect of biaxial stress on the fatigue crack growth properties ⊿KⅠ-da/dN. From these comprehensive experiments, the remarkable effect was found in the specific biaxiality ratio σx 0/σy 0 on the ⊿KⅠ-da/dN relationship. When biaxiality ratio was 0.5, it turned out that the fatigue crack propagation velocity of a magnesium alloy becomes very slow. In other biaxiality ratios, fatigue crack propagation velocity was influenced in some extent. Fatigue crack propagation velocity decreases a little as the stress which acts in parallel with a crack increases.
W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo
Y. Ito and A. Shimamoto, "Effects of Biaxial Stress Condition for Fatigue Properties of Magnesium Alloy", Materials Science Forum, Vols. 488-489, pp. 859-864, 2005