Ageing characteristics of furnace cooled eutectoid Zn-Al based alloy


    loading  Checking for direct PDF access through Ovid

Abstract

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.

    loading  Loading Related Articles