(1.中南工业大学材料系， 长沙 410083 ;
2.中船总公司七院第七二五研究所， 洛阳 471039 ;
3.南京大学物理系， 南京 210093)
摘 要: 用受迫振动法测量了铝合金层压板的内耗，在经65%冷变形后的层压板中观 测到一个低温内耗峰，峰巅温度为55 ℃左右(频率0.1，1Hz)。随室温时效时间延长，该 峰逐渐减弱直至消失。该峰是层压板中锌铝共析合金晶界结构呈不规则分布造成的，属晶粒间界内耗峰。随时效时间延长，该合金不规则晶界被规则多边化晶界替代，α/α, α/β,β/β晶粒间界粘滞性滑移被抑制，内耗峰逐渐减弱，直至消失。锌铝合金性能的 稳定性与晶界特征有关。为了提高锌铝合金的性能稳定性，要防止晶界特征随时间发生变化。
关键字: 高阻尼合金 层压板 晶界 内耗
（1.Department of Materials Science and Engineering,
Central South University of Technology, Changsha 410083
2 .China Ship Industry General Corporation, Luoyang 471039
3. Department of Physics, University of Nanjing, Nanjing 210093）
Abstract:Internal friction of aluminium alloy laminates with a reductiion of area by 65% at room temperature was measured with forced-vibration method. Internal friction peaks vs temperature were observed around 55 ℃ (frequency 0.1, 1 Hz). With the ageing time lengthened, the peak weakened gradually and disappeared completely after a year. Preliminary discussions were made on the mechanism of this internal friction peak associated with the laminate's properties.
Key words: internal friction aluminium alloy laminates boundaries
