【摘要】 利用喷雾沉积快速凝固技术制备了ZA27合金,探讨了该工艺对ZA27合金组织和阻尼性能的影响,并与铸态的同类合金作了对比。结果表明,无论是喷雾沉积态还是铸态,随着频率的减小或温度的升高,ZA27合金的阻尼值增大,且在试验范围内阻尼性能不随应变振幅变化。室温下,喷雾沉积态ZA27合金的阻尼性能高出铸态合金的约1倍,如振动频率为1Hz,30℃时喷雾沉积ZA27合金的阻尼可达1.62×10-2。但当温度高于一定值以上时,铸态的阻尼性能高于喷雾沉积态的。阻尼的这种变化是与其组织密切相关的。更多还原

【Abstract】 ZA27 alloy was processed by spray deposited rapid solidification technique, the influence of the process on the damping capacity and the microstructure of the alloy was discussed, comparison between spray deposited (SP) and ascast ZA27 alloys on properties and microstructures were also drawn. It can be concluded that whether ascast or SP ZA27 alloy, as increase of vibrate frequency or decrease of temperature, the damping capacities of the alloys decrease, whereas vibration amplitude has no effect on the damping capacities of the alloys at the range of vibration amplitude in the experiment. The damping capacity of SP ZA27 alloy is 1 times higher than that of as-cast ZA27 alloy at ambient temperature. For example, the damping capacity of the SP ZA27 alloy is 1.62×10-2 at 1Hz and 30℃. But when the temperature exceeds a certain value, the damping capacity of ascast alloy will higher than that of SP alloy. It is found that the variety of damping capacity of the alloys was associated closely with their microstructures.更多还原