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The effects of little Ce addition on the as-cast microstructure and creep properties of Mg-3Sn-2Ca magnesium alloy were investigated.The results indicate that adding 0.5%(mass fraction)Ce to Mg-3Sn-2Ca alloy does not cause the formation of any new phase in the alloy.However,an interesting microstructural change in the as-cast Mg-3Sn-2Ca alloy added with 0.5%Ce is observed. After adding 0.5%Ce to Mg-3Sn-2Ca alloy,not only the volume fraction of CaMgSn phase in the alloy is decreased but also the CaMgSn phases in the alloy are refined.In addition,adding 0.5%Ce to Mg-3Sn-2Ca alloy can also improve the creep-resistant properties of the alloy.After adding 0.5%Ce to Mg-3Sn-2Ca alloy,the second creep rate of the alloy at 150℃and 70 MPa for 100 h changes from 3.28×10-8to 1.81×10 -8s -1.
The effects of little Ce addition on the as-cast microstructure and creep properties of Mg-3Sn-2Ca magnesium alloy were investigated. The results indicate that adding 0.5% (mass fraction) Ce to Mg-3Sn-2Ca alloy does not cause the formation After adding 0.5% Ce to Mg-3Sn-2Ca alloy, not only the volume fraction of CaMgSn phase in the alloy is decreased but also the CaMgSn phases in the alloy are refined. addition of 0.5% Ce to Mg-3Sn-2Ca alloy can also improve the creep-resistant properties of the alloy. After adding 0.5% Ce to Mg-3Sn-2Ca alloy, the second creep rate of the alloy at 150 ° C. and 70 MPa for 100 h changes from 3.28 × 10 -8 to 1.81 × 10 -8 s -1.