Effects of Ca and Sn on Microstructure and Mechanical Properties of Mg-4Zn Alloy

doi:10.15980/j.tzzz.2022.10.013

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Effects of Ca and Sn on Microstructure and Mechanical Properties of Mg-4Zn Alloy
Vol. 42, Issue 10, Pages: 1263-1270(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.10.013

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Effects of Ca and Sn on Microstructure and Mechanical Properties of Mg-4Zn Alloy. [J]. Special Casting & Nonferrous Alloys 42(10):1263-1270(2022)
DOI：

Effects of Ca and Sn on Microstructure and Mechanical Properties of Mg-4Zn Alloy. [J]. Special Casting & Nonferrous Alloys 42(10):1263-1270(2022) DOI： 10.15980/j.tzzz.2022.10.013.

摘要

系统研究了Ca和Sn的添加对Mg-4Zn合金织构及力学性能的影响。结果表明，Ca显著细化合金组织并弱化织构。添加Sn导致MgSnCa相的生成，削弱了Ca的织构弱化效果。轧制态Mg-4Zn-0.2Ca合金具有最高的伸长率，达14.4%。同时加入Ca和Sn

显著提高了合金的强度，其中轧制态Mg-4Zn-0.2Ca-2Sn合金的强度最高，屈服强度和抗拉强度分别为255.4 MPa和295.3 MPa

但由于基面织构强度增加，伸长率明显降低。退火后，合金的强度下降，伸长率提高，这与合金中位错密度下降以及晶粒尺寸增大有关。

Abstract

The effects of the addition of Ca and Sn on the texture and mechanical properties of Mg-4 Zn alloy were investigated. The results reveal that Ca can significantly refine grains and weaken the texture of alloy. MgSnCa phase is synthesized with the addition of Sn

which weakens the texture weakening effect of Ca. The rolled Mg-4 Zn-0.2 Ca alloy possesses the highest ductility of about 14.4%. The co-addition of Ca and Sn greatly improves the strength of the alloy. The rolled Mg-4 Zn-0.2 Ca-2 Sn alloy exhibits the highest strength

where yield strength and tensile strength reach up to 255.4 MPa and 295.3 MPa

receptively. However

the elongation is decreased obviously due to the increase of base texture intensity. After annealing treatment

the strength of the alloy is decreased with the increases of elongation

which is related to the decrease of dislocation density and the increase of grain size in the alloy.