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首页> 外文期刊>Key Engineering Materials >Susceptibility of Damping Behavior to the Solidification Condition in the As-Cast M2052 High-Damping Alloy
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Susceptibility of Damping Behavior to the Solidification Condition in the As-Cast M2052 High-Damping Alloy

机译：As-Mast M2052高阻尼合金的阻尼行为对凝固条件的敏感性

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摘要

M2052 alloy is a MnCu based high damping alloy that shows high damping capacity and the superior workability. In the present work, the microstructure and damping behavior of the alloy in different solidification cooling rates are investigated with directionally cast alloy plate. For the variation of solidification cooling rate in the range of 250～10K/s, the secondary dendrite arm spacing of the cast alloy changes from 4 to 18mm and grain size varies in the range of 100～200mm except the surface regions and center regions in the cast plate. As compared to the worked and heat treated alloy, the as-cast alloy shows a high temperature damping above the average phase transformation temperature of the alloy irrespective to the solidification cooling rate. On the other hand, a higher damping peak is observed in the cast alloy which is attributed much to the twin boundary damping, however, the magnitudes of the damping peak are found to be varied corresponding to the respective solidification conditions.
机译：M2052合金是MnCu基高阻尼合金，具有高阻尼能力和出色的可加工性。在目前的工作中，研究了定向铸造合金板在不同凝固冷却速率下合金的组织和阻尼行为。当凝固冷却速度在250〜10K / s范围内变化时，铸造合金的二次枝晶臂间距从4mm变为18mm，晶粒尺寸在100〜200mm范围内变化，除了合金的表面区域和中心区域。铸板。与经加工和热处理的合金相比，铸态合金在高于合金平均相变温度的情况下显示出较高的高温阻尼，而与凝固冷却速率无关。另一方面，在铸造合金中观察到较高的阻尼峰，这很大程度上归因于孪晶边界阻尼，然而，发现该阻尼峰的大小对应于各自的凝固条件而变化。

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