Ageing characteristics of furnace cooled eutectoid Zn-Al based alloy
Ageing characteristics of furnace cooled eutectoid Zn-Al based alloy
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炉冷共析Zn-Al基合金时效特性
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
W. Lee
中科院分区：
文献类型：
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作者：
Y. Zhu;H. Man;H. Dorantes;W. Lee
采用X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）等技术研究了一种炉冷共析Zn-Al基合金在100和170°C时效过程中的相变和显微组织变化。炉冷共析Zn-Al合金发生了三次相变。等温时效过程中，亚稳η′FC相发生分解。在η′FC相的不连续分解之后，发生了α + ε → T′ + η的四相转变。在扫描电子显微镜下观察到η′FC和ε相分解的典型形貌。透射电镜观察到富铝α相在长时间时效过程中发生分解。不同类型的分解的不同亚稳相占主导地位，在不同阶段的老化。
Phase transformations and microstructural changes of a furnace cooled eutectoid Zn-Al based alloy were studied during ageing at 100 and 170°C using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Three phase transformations occurred in the furnace cooled eutectoid Zn-Al alloy. The metastable η′FC phase decomposed during isothermal ageing. The four-phase transformation, α + ε → T′ + η followed the discontinuous decomposition of the η′FC phase. Typical morphologies of the decomposition of the η′FC and ε phases were observed in scanning electron microscopy. Decomposition of Al-rich α phase was observed during the prolonged ageing by transmission electron microscopy. The different types of decomposition of the different metastable phases dominated at different stages of ageing.