Equal channel angular pressing (ECAP) has been conducted on as-cast Mg–4.3 wt.%Zn–0.7 wt.%
Y Mg allo
y containing quasicr
ystal phase at a temperature of 623 K. After 8 ECAP passes, the grain size of the as-cast allo
y is decreased from
![not, vert, similar](http://www.sciencedirect.com/scidirimg/entities/223c.gif)
120 to
![not, vert, similar](http://www.sciencedirect.com/scidirimg/entities/223c.gif)
3.5 μm, and the coarse eutectic quasicr
ystal phases are broken and dispersed in the allo
y. Tensile testing has been performed on the ECAPed Mg–Zn–Y allo
y at temperatures of 523 K and 623 K with initial strain rates from 1.5 × 10
− 3 to 1.5 × 10
− 4 s
− 1. The ECAPed allo
y exhibits a maximum elongation of about 600%when testing at 623 K using an initial strain rate of 1.5 × 10
− 4 s
− 1. Grain boundar
y sliding is considered to be the dominant deformation mechanism of the Mg–Zn–Y allo
y in the temperature and strain-rate range investigated.