Er和Ce对铸造ZL101A铝合金组织与力学性能的作用对比研究

Contrast study on effects of Er and Ce on the microstructure and mechanical properties of cast ZL101A aluminum alloy

在ZL101A铝合金中分别加入稀土元素Er和Ce,比较加入两种稀土后合金的组织和力学性能方面的差异。结果表明:在α-Al和共晶Si方面,Er的细化作用明显优于Ce,加入Er可在ZL101A铝合金中形成更加细小和弥散分布的稀土化合物相,使合金的力学性能有较大程度的提高,其ZL101A(Er)合金的抗拉强度达到188 MPa,伸长率是6.7%,高于ZL101A(Ce)合金。

Adding rare earth elements Er and Ce to ZL101A aluminum alloy,the differences in microstructure and mechanical proper-ties between the two rare earth treatmentsare are compared.The results show that:in terms of Al and eutectic Si,the refinement effect of Er is significantly better than that of Ce.The addition of Er can form a finer and dispersed rare earth compound phase in ZL101A aluminum alloy,which greatly improves the mechanical properties of the alloy,ZL101A(Er)alloy has a tensile strength of 188 MPa and an elongation of 6.7%,which is higher than that of ZL101A(Ce)alloy.