The effects of wall thickness on microstructure and properties of ZL101 alloy by lost foam casting under the condition of no-vibration and vibration were investigated

and the mechanism was described.The results show that

with the increase of wall thickness of the specimens

the grain size of ZL101 alloy is increased under the condition of no-vibration and vibration

however the primaryα-Al is relatively small and uniform

and the shape is more spherical in ZL101 alloy under vibration.Compared with the ZL101 alloy without vibration

the grain size and second dendritic arm spacing are decreased

and the primary phase shape coefficient is relatively larger under the condition of vibration at the same wall thickness.With the increase of the wall thickness of specimen

the tensile strength

yield strength

hardness and elongation are gradually decreased of ZL101 alloy under the condition of vibration

however compared with that without vibration

the tensile strength

yield strength

hardness and elongation of ZL101 alloy are greatly improved at the same wall thickness.