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研究了含Fe量和时效对Mn-Cu阻尼合金力学性能的影响。借助多功能内耗仪分析了合金的阻尼性能;通过拉伸试验研究了力学性能;采用光学电镜观察金相组织;借助X射线衍射仪分析了Fe原子所引起的晶格畸变;借助扫描电镜观察了试样的断口形貌。结果表明,Fe元素的添加会导致阻尼性能减小。同时,固溶Fe导致晶格畸变和晶粒细化,改善了合金的力学性能。经时效处理,合金强度明显提高,伸长率稍有降低。所有材料的断裂都为韧性断裂。在满足实际工程需求的前提下可通过添加Fe元素和进行时效,以牺牲部分阻尼性能来提高Mn-Cu合金的力学性能。
The effect of Fe content and aging on the mechanical properties of Mn-Cu damping alloys was investigated. The damping properties of the alloy were analyzed by multi-function internal friction instrument. The mechanical properties were studied by tensile test. The microstructure was observed by optical microscope. The lattice distortion caused by Fe atoms was analyzed by X-ray diffractometer. Fracture morphology of the specimen. The results show that the addition of Fe can lead to the decrease of damping capacity. At the same time, solid solution of Fe leads to lattice distortion and grain refinement, improving the mechanical properties of the alloy. After aging treatment, the alloy strength increased significantly, the elongation decreased slightly. All materials have a ductile fracture. The mechanical properties of Mn-Cu alloy can be improved by adding Fe and aging at the premise of meeting the actual engineering requirements, at the expense of some damping properties.