Al-Zn-Mg-Cu系高强铝合金显微组织的定量分析

借助于光学显微镜、SEM、EDS和MTS拉伸试验机等测试手段,研究Al Zn Mg Cu系新型高强铝合金不同制备工艺下断口形貌、显微组织及力学性能,利用定量金相技术对该合金中残留第二相尺寸、数量及圆滑度等特征参数进行较系统的定量分析.实验结果表明:制备工艺不同,合金中残留第二相的特征参数有较大差异,对合金的断裂韧性影响显著;通过制定合理的工艺参数,可达到控制显微组织和改善性能的目的.

Quantitative analysis and study on microstructure of Al-Zn-Mg-Cu high-strength aluminum alloy

By means of microscope ?SEM?EDS and MTS, the microstructure,fracture behavior and mechanical properties of high-strength aluminum alloy were studied. The size,quantity and x/y of remained second phase were measured using quantitative analysis technology. The results showed that there were differences in character parameter of remained second-phase under different manufacture process. Size,quantity,x/y and distribution of remained second-phase have important influence on fracture toughness. Microstructure and properties may be improved through the controlling process.