Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20570
Title: Structural changes of α phase in furnace cooled eutectoid Zn-Al based alloy
Authors: Zhu, YH
Chan, KC 
Pang, GKH
Yue, TM 
Lee, WB 
Keywords: Microstructural evolution
Phase decomposition
Zn-Al alloys
Issue Date: 2007
Publisher: Elsevier
Source: Journal of materials science & technology, 2007, v. 23, no. 3, p. 347-352 How to cite?
Journal: Journal of materials science & technology 
Abstract: Furnace cooling is a slow cooling process. It is of importance to study structural evolution and its effects on the properties of alloys during the furnace cooling. Decomposition of aluminium rich α phase in a furnace cooled eutectoid Zn-Al based alloy was studied by transmission electron microscopy. Two kinds of precipitates in the α phase were detected in the FCZA22 alloy during ageing at 170°C. One was the hcp transitional α′m phase which appears as directional rods and the round precipitates. The other was the fcc α′m phase. It was found that the transitional phase α′m grew in three preferential directions of <110>, <011> and <101>. The orientation relationship between the α phase and transitional phase α′m was determined as,. The non-equilibrium phase decomposition of the α phase is discussed in correlation with the equilibrium phase relationships. (022̄)α′m(fcc) //(022̄)α(fcc), [1̄11]α′m(fcc) //[2̄33]α(fcc). The non-equilibrium phase decomposition of the phase is discussed in correlation with the equilibrium phase relationships.
URI: http://hdl.handle.net/10397/20570
ISSN: 1005-0302
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