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利用金相显微镜、球差校正扫描透射电镜、透射电镜(TEM)、电子背散射衍射分析技术(EBSD)和X射线能谱(EDS)等分析方法,对新型耐热高强韧铸造铝合金(211Z.1)热处理后的微观组织结构进行了研究。结果发现,211Z.1铝合金微观组织由尺寸小于100nm的GPI区、θ″-Al3Cu相及θ′-Al2Cu相组成。晶体内部弥散分布直径约为80nm、长度约为600nm的棒状T-Al20Cu2Mn3相,T相周围附着尺寸较大的θ′相。基体中还存在尺寸在2nm左右的球状颗粒状Cd相,与基体完全共格。
The corrosion resistance of the new heat-resistant and high-toughness cast aluminum alloy (211Z) was investigated by metallographic microscope, spherical aberration corrected scanning transmission electron microscopy, transmission electron microscopy (TEM), electron backscatter diffraction analysis (EBSD) and X-ray energy dispersive spectroscopy (EDS) .1) The microstructure after heat treatment was studied. The results show that the microstructure of 211Z.1 aluminum alloy consists of GPI region, θ "-Al3Cu phase and θ’-Al2Cu phase with size less than 100nm.The internal distribution of rod-shaped T-Al20Cu2Mn3 phase is about 80nm in diameter and about 600nm in length , Around the T phase attached to the larger size θ ’phase. There are also matrix size of about 2nm spherical granular Cd phase, and the matrix completely coherent.