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对Ａｌ－Ｍｇ－Ｍｎ－Ｚｒ合金（成分接近ＬＦ６）的超塑性进行了研究，该合金经适当形变热处理后，可以获得良好的超塑性。显微组织由于基体内弥散分布大量第二相粒子，在超塑变形时能够获得稳定、等轴的细晶结构，因而超塑效应十分显著。合金的超塑断裂是脆性沿晶断裂，主要是空洞长大和连接的结果。
The superplasticity of Al-Mg-Mn-Zr alloy (composition close to LF6) has been investigated. The alloy can be well superplasticized by proper heat treatment. Due to the large number of second-phase particles dispersed in the matrix, the microstructure can obtain stable and equiaxed fine-grained structure during the superplastic deformation, so the super-plastic effect is very significant. The superplastic fracture of the alloy is a brittle intergranular fracture, mainly as a result of void growth and connection.