Effects of Be addition on the as-cast microstructure

mechanical properties and corrosion resistance of AZ91 magnesium alloy were described.It is indicated that size of primary α-Mg phase and morphology

size and distribution of γ-Mg17Al12 phase in microstructure can be greatly changed with the addition of Be into the AZ91 magnesium alloy.Meanwhile

with increasing in Be addition

tensile strength and elongation of the alloy are firstly decreased then increased and then decreased.Tensile strength and elongation of the alloy with 0.15% Be addition are 167.74 MPa and 5.87%

respectively

which are increased by 11.4% and by 215.6%

respectively

compared with those of the alloy without Be addition.The corrosion rate of the AZ91 magnesium alloy with Be addition is higher than that of one without Be

showing the deterioration of corrosion resistance of the alloy with Be.