摘要
针对高锰含量（Mn％≥70％）锰铜阻尼合金的阻尼特性开展了研究，采用高精度多功能内耗测试仪在受迫振动模式下测试了合金的内耗随温度、频率和应变振幅变化的规律，同时考察了适量Al部分替代Ni对合金阻尼特性的影响。结果表明：振动频率对内耗大小无影响，但随着振动频率增加，孪晶转变的内耗峰向高温方向移动；应变振幅对内耗大小影响显著，随着应变振幅增加，内耗大大增加；A1的添加使马氏体相变的内耗峰与孪晶转变的内耗峰分离，并移至l00～120℃，内耗的峰值达1．5×10，值得注意的是，马氏体相变内耗峰对应变振幅的变化不敏感，随频率增加，内耗峰下降。分析认为，A1元素提高了马氏体相变的温度，从而使阻尼特性的温度范围增加。
In this paper, the research on the damping characteristics of manganese copper damping alloy with high manganese content （Mn%70%） was carried out, using high-precision multifunction internal friction tester to test the internal friction change law of the alloy with temperature, frequency and strain amplitude change in forced vibration mode. Meanwhile, the effect of partial substitution of appropriate amount of A1 for Ni on the damping characteristics of the alloy was also studied. The results show that vibration frequency has no effect on the magnitude of the internal friction basically, but with the vibration frequency increasing, internal friction peak moves to higher temperature; strain amplitude affects the internal friction significantly, as the strain amplitude increases, the internal friction is greatly increased. The addition of A1 makes the internal friction peak of martensitic and twins separate, and move to 100～ 120℃, internal friction peak value reaches 1.5 × 10^-2. It should be noted that the high temperature peak is not sensitive to the change of strain amplitude, and with frequency increasing, the internal friction peak decline. Through the analysis, A1 element improves the martensitic transformation temperature, so that the temperature range of the damping characteristics increases.
出处
《金属材料研究》
2013年第1期6-12,共7页
Research on Metallic Materials
关键词
锰铜合金
阻尼特性
内耗
manganese copper alloy
damping characteristics
internal friction
