(江蘇大學(xué) 材料科學(xué)與工程學(xué)院, 鎮(zhèn)江 212013)
摘 要: 用懸臂梁彎曲共振法研究了新型CuAlMn系形狀記憶合金在馬氏體態(tài)和母相態(tài)的阻尼特性。研究結(jié)果表明： 室溫馬氏體態(tài)Cu-10.5%Al-6%Mn（質(zhì)量分數(shù)）和室溫母相態(tài)Cu-11%Al-8%Mn形狀記憶合金在表面應(yīng)變振幅為4.05MPa時， 都具有很高的阻尼性能， 內(nèi)耗Q-1接近0.1； 兩種形態(tài)的CuAlMn形狀記憶合金的阻尼性能都隨應(yīng)力振幅增加而下降，且母相態(tài)合金阻尼性能下降速度更快。
關(guān)鍵字: 高阻尼金屬； 形狀記憶合金； 阻尼性能； CuAlMn合金
（ Department of Materials Science and Engineering,
Jiangsu University, Zhenjiang 212013, China）
Abstract: The damping properties of CuAlMn shape-memory alloys both in martensite and parent phase were investigated using cantilever resonant-bar technique. It is found that Cu-10.5%Al-6%Mn and Cu-11%Al-8%Mn(mass fraction) shape memory alloys exhibit high damping capacity both in martensite and parent phase, with internal friction (Q-1) approximately as high as 10-1 when the applied stress amplitude is 4.05MPa. The damping capacity decreases with increasing surface stress amplitude in either martensite or parent phase, while it decreases faster in alloy with parent phase.
Key words: high-damping metals; shape memory alloys; damping capacity; CuAlMn alloys
