Fatigue behaviour of welded joints from magnesium alloy (AZ31) according to the local strain concept

摘要

In the present study, the results of fatigue tests with the magnesium alloy AZ31 (ISO-MgAI3Zn1) in the material states base metal, heat affected zone and weld metal obtained under strain control at room temperature within a range from 2 · 10~2 to 5 · 10~6 cycles are presented. The fatigue behaviour was characterized by the Coffin-Manson-Basquin equations and the stress - strain behaviour by the Ramberg-Osgood equation. The data can be used to assess welded magnesium joints according to the local strain concept.