论文部分内容阅读
一般工业铝合金阻尼性能较差,阻尼性能Q~(-1)大约在10~(-4)～10~(-5)数量级,不能作为金属阻尼材料在工业上使用。研究发现变形Al-Si合金可在某种条件下获得阻尼性能、其变化规律是阻尼及强度性能随加工量的增加而增加。并且发现阻尼性能Q~(-1)与温度、频率之间存在一定的依赖关系。测试了阻尼性能Q~(-1)、杨氏模量随变形量变化的关系曲线,以及不同频率条件下阻尼性能Q~(-1)随温度变化的关系曲线和不同温度条件下阻尼性能Q~(-1)随频率变化的关系曲线。并配合x-射线能谱分析,扫描电镜和透射电镜对组织进行观察,以位错角度对阻尼机理予以解释。
Generally, industrial aluminum alloy has poor damping performance and its damping capacity Q ~ (-1) is on the order of 10 ~ (-4) ~ 10 ~ (-5), which can not be used industrially as a metal damping material. The results show that the deformation properties of Al-Si alloy can be obtained under certain conditions. The changing rule is that the damping and strength properties increase with the increase of processing volume. It is found that there is a certain relationship between the damping performance Q ~ (-1) and temperature and frequency. The relationship curves of damping capacity Q ~ (-1) and Young ’s modulus with deformation are tested, and the relation curves of damping capacity Q ~ (-1) with temperature at different frequencies and the damping capacity Q ~ (-1) as a function of frequency. And with the X-ray energy spectrum analysis, scanning electron microscopy and transmission electron microscopy of the organization to observe the damping mechanism to explain the dislocation.