8Cu4Er相的形成與演變規(guī)律及其對Al-Zn-Mg-Er-Sc-Zr合金腐蝕性能的影響。結(jié)果表明：隨著Cu含量的增加，合金晶粒得到顯著細化，但同時固溶態(tài)合金不同類型的殘余相增多；Al8Cu4Er相與Al-Fe相存在伴生關(guān)系，二者通過Cu與Fe交互作用實現(xiàn)相的轉(zhuǎn)化，且可表述為如下關(guān)系式：；不同成分合金的晶間腐蝕均表現(xiàn)出與殘余相密切相關(guān)的點蝕特征，含Cu、Er的Al-Fe相雖然具有更小的腐蝕坑尺寸，但網(wǎng)狀分布特征使腐蝕深度有所增加；而具有更好耐蝕性能的Al8Cu4Er則因相的粗化和它與Al-Fe相的伴生關(guān)系導致合金耐蝕性能嚴重下降。;The formation and evolution of the Al8Cu4Er phase and its influence on the corrosion resistance of Al-Zn-Mg-Er-Sc-Zr alloys were studied by changing the element content of Cu. The results show that with the increase in Cu content, the grains of the alloy are significantly refined, but at the same time, different types of residual phases in the solid-solution-state of the alloy increase. There is a companion relationship between the Al8Cu4Er phase and the Al-Fe phase, and they achieve phase transformation through the interaction between Cu and Fe. It can be expressed as the relationship: . The intergranular corrosion of alloys with different compositions shows pitting characteristics closely related to the residual phase. Although the Al-Fe phase containing Cu and Er has a smaller corrosion pit size, the network distribution characteristics increase the corrosion depth, while the Al8Cu4Er with better corrosion resistance has a serious decline in the counterpart of the alloy due to its tendency to coarsen and interactive relationship with the Al-Fe phase."/>
8Cu4Er相;Al-Fe相;腐蝕性能;Al-Zn-Mg-Cu-Er alloy;Al8Cu4Er phase;Al-Fe phase;corrosion properties"/>