Microstructural development of spray-deposited Al–Zn–Mg–Cu alloy during subsequent processing
Microstructural development of spray-deposited Al–Zn–Mg–Cu alloy during subsequent processing
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DOI：
10.1016/j.jallcom.2008.10.115
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发表时间：
2009-05
影响因子：
6.2
通讯作者：
Feng Wang;B. Xiong;Yongan Zhang;Hongwei Liu;Xiaoqing He
中科院分区：
文献类型：
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作者：
Feng Wang;B. Xiong;Yongan Zhang;Hongwei Liu;Xiaoqing He
采用喷雾雾化沉积技术制备了Al-10.8Zn-2.8Mg-1.9Cu合金。采用扫描电镜（SEM）、透射电镜（TEM）和X射线衍射分析等手段，研究了喷射沉积合金的组织特征及其在热挤压和热处理过程中的演变规律。结果表明，该合金的显微组织主要由Al基体和形状各异的Mg（ZnCu）2化合物组成。挤压过程中Mg（ZnCu）2相的破碎被认为是合金的主要特征之一。固溶处理后的组织由Al基体和少量Al 7 Cu 2Fe颗粒组成。在峰值时效条件下（120°C下16 h），GP区和/或亚稳η'相是合金的主要析出相。
In this study, Al–10.8Zn–2.8Mg–1.9Cu alloy was synthesized by the spray atomization and deposition technique. The structural characteristics of spray-deposited alloy and their development during subsequent hot extrusion and heat treatment were investigated by means of scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction. The results indicate that the microstructure of the alloy mainly is composed of the Al matrix, the Mg(ZnCu)2compounds with various shape. The fragmentation of the Mg(ZnCu)2phases in the alloy has been regarded as one of the main feature during extrusion. After solution treating, the microstructure is found to be composed of the Al matrix and a spot of Al7Cu2Fe particles. The GP zones and/or the metastable η’ phase from the matrix are major precipitates for the alloy under peak-aged condition (16h at 120°C).