论文部分内容阅读
锰铜合金以其优异的高阻尼性能而引起重视。近廿年来对其高阻尼机理进行了不少研究,但大都集中在含锰80％以上的高锰区,提出了反铁磁有序导致f.c.c→f.c.t马氏体相变以及马氏体内部微孪晶是产生内耗的原因。工业应用的高阻尼合金含锰量一般在40～60％,经时效后同样能获得高阻尼性能,对这类合金的微观机理研究得较少。Vitek曾经推测Mn—Cu相图中存在互溶间隙区,高阻尼性能可能来自富锰相的马氏体转变,但未有显微分析方面的证实。
Manganese copper alloy with its excellent high damping performance and attention. Many researches have been done on its high damping mechanism in recent twenty years, but most of them are concentrated in high-manganese areas containing more than 80% manganese. The antiferromagnetic order leads to the fcc → fct martensitic transformation and the martensite internal micro- Twins are the cause of internal friction. Industrial application of high-damping alloy manganese content is generally 40 to 60%, after aging can also get high damping performance, the microscopic mechanism of such alloys are less studied. Vitek had speculated that there was a miscible intergranular zone in the Mn-Cu phase diagram. The high damping performance might come from the martensite transformation of the Mn-rich phase, but no microscopic analysis confirmed this.