期刊论文

Pan Qing-lin

英文

中国有色金属学报(英文版)

1003-6326

2011

21

10

2127-2133

10.1016/S1003-6326(11)60984-9

National High-tech Research and Development Program of ChinaNational High Technology Research and Development Program of China [2006AA03Z523]

本校为其他机构

The microstructural evolution and composition distribution of an Al-Zn-Cu-Mg-Sc-Zr alloy during homogenization were investigated by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The results show that severe dendritic segregation exists in Al-Zn-Cu-Mg-Sc-Zr alloy ingot. There are a lot of eutectic phases at grain boundary and the distribution of the main elements varies periodically along interdendritic region. The main eutec...

用光学显微镜(OM)、扫描电子显微镜(SEM)、能谱分析(EDS)和X射线衍射技术(XRD)分析了不同均匀化条件下Al-Zn-Cu-Mg-Sc-Zr铝合金的组织演变与成分分布.结果表明:Al-Zn-Cu-Mg-Sc-Zr铝合金铸锭中存在严重的枝晶偏析,晶界有许多共晶相,主要元素在枝晶内部区域呈周期性分布；晶界的主要共晶相为Al7Cu2Fe相和T (Al2Mg3Zn3)相；在合金均匀化过程中,随着温度的升高和时间的延长,残留相逐渐溶入基体,这个过程可以用一指数方程来描述；合金的过烧温度为473.9℃；最佳的均匀化处理制度为470℃,24 h,这一结果与均匀化动力学方程测算的结果相符.