摘要
研究了一系列典型CuAlMn系形状记忆合金的室温组织和阻尼特性。表面应力振幅4 05MPa时,马氏体态和母相态的室温阻尼性能相当(Q 1≈0 1)。当应力振幅由4 05MPa增加到40 5MPa时,无论是在马氏体态还是母相态,CuAlMn形状记忆合金的阻尼性能都随应力振幅增加而下降,但母相态阻尼性能下降速度更快。研究结果说明常温下应力振幅对阻尼性能的影响不同于升降温过程。
The damping properties and microstructures at room temperature of several typical Cu-Al-Mn shape memory alloys have been studied. When the applied surface stress amplitude is 4.05MPa, the damping capacity of autensitic phase is almost equivalent to that of martensitic phase, with internal friction (Q^(-1)) approximately as high as 10^(-1). In the range of 4.05 to 40.5MPa, the damping capacity of Cu-Al-Mn SMAs decreases with increasing stress amplitude, however, it decreases faster in austenstic state. Moreover, experimental results show that the effect of stress amplitude at a constant temperature is diverse from that during heating and cooling.
出处
《铸造》
CAS
CSCD
北大核心
2004年第12期984-987,共4页
Foundry
