铝合金板材时效组织的高分辨分析

本文通过X射线衍射、扫描电镜、高分辨透射电镜,分析了6009铝合金时效组织,球形Mg2Si是其主要强化相。在电解低钛铝合金中,球形Mg2Si分布更为弥散、均匀。对高分辨像通过傅立叶变换和反傅立叶变换,得到了调幅分解组织的晶格像。结果表明:电解低钛铝合金其力学性能和组织优于熔配加钛铝合金;电解低钛铝合金中Mg和Si原子在铝基体的(200)面上偏聚,形成明显的调幅分解组织。

Microstructural analysis of an aged electrolytic low- titanium aluminum alloy plate

The investigation of the aged 6009 type aluminum alloy by employing X-ray diffractometer, scanning electron microscope and high resolution transmission electron microscope indicated that the dispersive and uniform spherical Mg2Si was the main reinforced phase. The crystal lattice imagine was obtained through Fourier transform and reverse Fourier transform of the HREM imagine. Results showed that the mechanical properties of the electrolytic low-titanium aluminum alloy was superior to that of the fused aluminum alloy containing titanium and a spinodal decomposed microstructure was generated in terms of the clustering of Mg and Si on (200) plane.