LF-6及LY-12铝高温凝聚态动力学性质研究──高温剪切模量的测量

Dynamic Properties of LF-6 and LY-12 Aluminum Alloy under High Temperature－High Temperature Shearing Modulus Measurement

摘要: 介绍LF-6及LY-12铝合金从常温到400 ℃高温下，在扭转Hopkinson杆上作的动态剪切模量的测试研究，并给出了相应温度范围LF-6铝杨氏模量及泊松比。它们和现有文献中的静态结果比较表明，动态性能普遍高于静态值，在高温下更显著。实验结果表明LF-6和LY-12铝合金，对于温度和加载率都是敏感的，高加载率下相对于静态的温度，敏感性要弱一些。文中给出了剪切模量、弹性模量等与温度的关系式。
- 高温Hopkinson扭杆 /
- 剪切模量 /
- 泊松比
Abstract: Investigations of high temperature shearing medulus with the torsional Hopkinson bar method, of LF-6 and LY-12 aluminum alloy at temperatures up to 440 ℃, is introduced, elastic modulus and Poisson ratio of LF-6 aluminum alloy are reported. Results show that these dynamic properties, especially at high temperatures, are generally higher than their static ones, LF-6 and LY-12 aluminum alloy are sensitive to both temperature and loading rates, but their sensitivity to temperature at high strain rates is less than that in static loading rate. In this paper relations of the shearing modulus and elastic modulus with temperature are given.
- torsional Hopkinson bar /
- high temperature shearing modulus /
- Poisson ratio