2015
DOI: 10.22226/2410-3535-2015-3-328-334
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Effect of chemical composition and grain size on RT superplasticity of Zn-Al alloys processed by ECAP

Abstract: Dilute Zn-0.3Al, eutectic Zn-5Al and eutectoid Zn-22Al alloys were processed by multi-pass equal channel angular pressing (ECAP) in order to achieve fine grained (FG) or ultrafine-grained (UFG) microstructure and room temperature (RT) superplasticity. ECAP refined the microstructure of Zn-0.3Al and resulted in a FG Zn-rich η-matrix with an average grain size of 2 µm and homogeneously distributed nano-sized Al-rich α-particles with the grain sizes in the range of 50-200 nm. A bi-modal microstructure was achieve… Show more

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Cited by 16 publications
(5 citation statements)
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“…The maximum Al content in this latter phase is far below 5 at. % at room temperature (see Figure 2a 35 ). This difference in sacrificial Al content between the α and η phases results in a high difference in Al removal kinetics between these two phases, making it more difficult to dealloy the Zn 20 Al 80 at.…”
Section: Introductionmentioning
confidence: 99%
“…The maximum Al content in this latter phase is far below 5 at. % at room temperature (see Figure 2a 35 ). This difference in sacrificial Al content between the α and η phases results in a high difference in Al removal kinetics between these two phases, making it more difficult to dealloy the Zn 20 Al 80 at.…”
Section: Introductionmentioning
confidence: 99%
“…The onset of the endothermic eutectoid reaction occurred at 268.3°C. The following reaction may be observed in the binary system of Zn-Al (Demirtas et al , 2015): …”
Section: Resultsmentioning
confidence: 99%
“…According to the phase diagram of Al-Zn [ 18 ], zinc is one of the promising alloying elements because it is well dissolved in aluminum and almost not dissolved in solid tin [ 19 ] ( Figure 1 ). Therefore, Zn cannot strongly affect the plasticity of Sn inclusions.…”
Section: Introductionmentioning
confidence: 99%