高阻尼铝合金层压板的低温内耗峰

来源期刊：中国有色金属在线1997年第2期

论文作者：罗兵辉 张迎元 柏振海 朱劲松

文章页码：97 - 99

关键词：高阻尼合金 层压板 晶界 内耗

Key words：internal friction aluminium alloy laminates boundaries

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。

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.