A transmission electron microscopy investigation of defects in an Mg-Cu-Mn-Zn-Y damping alloy

A transmission electron microscopy investigation of defects in an Mg-Cu-Mn-Zn-Y damping alloy
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Mg-Cu-Mn-Zn-Y 阻尼合金缺陷的透射电子显微镜研究

DOI:
10.1016/j.jallcom.2011.12.035
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发表时间:
2012-03
影响因子:
6.2
通讯作者:
Wei, Wenwen
Wei, Wenwen
中科院分区:
材料科学2区
文献类型:
--
作者:
Huang, Xuefei;Zhang, Wenzheng;Wang, Jingfeng;Wei, Wenwen

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在铸态高阻尼Mg-3Cu-1 Mn-2 Zn-1 Y(wt.%)合金中观察到了大量的位错透射电子显微镜(TEM)观察合金的微观结构。大部分位错呈平行且均匀的列分布。基体中的Mg 2Cu颗粒经常被发现与许多平行位错相关联。含有堆垛层错的双胞胎也经常被观察到。在铸造过程中共晶相的形成之后,退火时在具有合金元素的过饱和α-Mg中析出第二金属间相。所观察到的缺陷结构提供了有用的实验证据,支持先前提出的镁合金阻尼机制。
A high number of dislocations have been observed in an as-cast high-damping Mg-3Cu-1Mn-2Zn-1Y(wt.%) alloy using transmission electron microscope (TEM). The majority of dislocations are distributed in parallel and uniform rows. Mg2Cu particles in the matrix are often found to be associated with a number of parallel dislocations. Twins containing stacking faults are also frequently observed. The formation of eutectic phases occurring during casting is followed by precipitation of secondary intermetallic phases in supersaturated α-Mg with alloying elements upon annealing. The observed defect structures provide useful experimental evidence supporting the previously proposed damping mechanism for Mg alloys.
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影响因子: 6.2
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