【作者】 李丹；

【导师】 程晓农；

【作者基本信息】 江苏大学 ， 材料学， 2002， 硕士

【摘要】 通过分析多个合金相图及合金元素对其的影响规律,进行了Cu基高阻尼合金材料的优化设计和试验研究,获得了Al,Ni,Mn三种合金元素在Cu基合金中的合理配比,经过多种性能的初步测试,筛选得到了三种成分的合金:Cu-Al14-Ni4,Cu-Al11-Mn6,Cu-Al13-Mn6-Ni4,进而对此三种合金进行了相变温度测试,金相组织观察及成分的系统分析,分析结果表明该三种合金都是相变温度在100℃以上的具有形状记忆合金组织转变特征的合金材料。本论文重点对三种合金的静态和动态性能(阻尼性能)进行了测试与研究,研究结果表明,该三种合金都具有较好的力学性能和阻尼性能,并且阻尼性能因材料不同和温度及载荷的变化而有较大变化,同时得到了Mn,Ni元素对该三种合金性能的影响作用。通过对在不同环境温度和试验载荷作用下的三种合金阻尼性能的系列试验的研究,获得了三种合金在不同温度和载荷下的阻尼特征和外界环境温度和载荷对合金阻尼性能的影响规律。本论文的研究工作不仅为在动态条件下使用的工程构件提供了一类即有良好结构性又有良好阻尼性能的高阻尼合金材料,同时为该类材料在不同服役环境下的使用提供了理论指导,扩大了高阻尼合金研究的范围。更多还原

【Abstract】 According to the analysis of correlative binary phase diagrams and the effects of elements on it, the components of Cu-base high damping alloy are optimized and the reasonable quotas of elements of Al, Ni, Mn are gained.Three kind of alloys Cu-A114-Ni4, Cu-All 1-Mn6, Cu-A113-Mn6-Ni4 are screened out after elementary test of the properties . The results of the test of the temperature of martensite phase transformation,the observation of microstructure and the systemic analysis of components indicate that these three alloys all have the structural transformation character of SMA and their temperatures of the phase transformation are all above 100°C.The static and dynamic properties of the three alloys are studied emphatically in this article.The study makes it clear that the three alloys all have favorable mechanical properties and damping properties and the damping properties vary under the different temperature and the stress.At the same time ,the impacts of the elements of Al, Ni, Mn on the three alloys are obtained.By the study of a series of experimentations of the damping properties under different temperatures and stresses,the changing rules and characteristics of damping properties of the three alloys are gained.The study not only provides some kinds of alloys with good mechanical properties and high damping properties for applications in engineering field under dynamic conditions,but also offers guidances in theory for the useage of these alloys in the different running conditions and widen the research field of high damping alloys.更多还原