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本文阐述了铝合金2124的显微组织、拉伸性能和断裂行为。进行了详细的光学显微镜和电子显微镜观察,分析了提供合金的显微组织。指出显微组织特征对合金的拉伸性能和准静态断裂性能有巨大的影响。拉伸试验结果显示合金在纵向和横向有均匀的强度和延展性。延伸率和面缩率高于横向挤压板。在试验方向看到断裂形式没有改变。在显微镜下看到由空隙成核、生长及聚合组成的断裂是延展性的。通过比较内在显微组织断裂、基体的变形特征及晶界破坏之间的相互影响讨论了合金的断裂过程。
This article describes the microstructure, tensile properties and fracture behavior of aluminum alloy 2124. A detailed optical microscope and electron microscope observation were performed, and the microstructure of the alloy was analyzed. It is pointed out that the microstructure characteristics have a great influence on the tensile properties and quasi-static fracture properties of the alloy. Tensile test results show that the alloy has uniform strength and ductility both longitudinally and transversely. Elongation and reduction of surface area is higher than that of horizontal compression plate. In the test direction saw no change in fracture form. It is seen under the microscope that the fracture consisting of voids nucleation, growth and polymerization is ductile. The fracture process of the alloy was discussed by comparing the internal microstructure fracture, the deformation characteristics of the matrix and the intergranular damage.