Effects of different Y contents

including 0

0.93%

2.25% and 3.50%

on microstructure and mechanical properties of Mg-0.8Zn-0.35Zr alloy were investigated. The results reveal that grain size in the alloy can be refined with Y addition

furthermore

with increasing in Y content

the secondary phase on the grain boundary and lamellar structure in grain are increased. In addition

with Y content increase

the ambient and elevated tensile strength of the alloy are improved

and the ambient elongation exhibits the phenomena of first increase and then decrease

where it reaches 26% with 0.93% Y content

however

the elevated elongation is decreased

alternatively

elevated creep resistance of the alloy is obviously improved.