Cavitation damage in the superplastic Zn-22% Al-0.5% Cu alloy

An Investigation of Cavity Development during Superplastic Flow in a Zinc–Aluminum Alloy Processed Using Severe Plastic Deformation

“…42) For the Zn22% Al0.5% Cu alloy, a value of © = 1.4 was obtained for a grain size of d = 1.2¯m where the sample was deformed to elongations of 500700%. 43) Although the values of these two cavity growth parameters are higher than in the present investigation, neither report considers a transition from superplastic diffusion growth to plasticity-controlled growth.…”

“…6 The variation of the volume of internal cavities versus elongation for the as-pressed Zn22% Al alloy tested at 1.0 © 10 ¹2 s ¹1 at 473 K: additional data are shown for unpressed Zn22% Al alloys. 42,43) Fig . 5 The distributions of the roundness coefficients for the as-pressed Zn22% Al alloy tested at 1.0 © 10 ¹2 s ¹1 at 473 K to elongations of (a) 500%, (b) 1000%, (c) 1500% and (d) to failure at 2230%.…”

“…6 at elongations >1000% denotes a region of plasticity-controlled growth and the dashed line at elongations <1000% denotes superplastic diffusion growth. 38) For comparison purposes, reference points are also included using data for a Zn22% Al alloy 42) and a Zn 22% Al0.5% Cu alloy 43) without processing by ECAP. For the Zn22% Al alloy, the material has a grain size of d = 1.25¯m and shows a cavity growth parameter of © = 1.65 when cavity volumes are considered through elongations less than 160%.…”

Influence of rolling direction on flow and cavitation in a superplastic magnesium alloy processed by equal-channel angular pressing

“…Very early experiments showed the cavities tend to form in stringers aligned parallel to the tensile axis [15][16][17][18] and later experiments confirmed these observations in both superplastic metals [19][20][21][22][23][24] and ceramics [25].…”

Predicción de la dureza de aleaciones Al-Cu-Zn en estado de colada y templado

“…Conforme a esta última investigación se ha planteado en este trabajo desarrollar dos series (ocho muestras de diferente composición en cada serie), las cuales cubrirán una cierta área del diagrama ternario Al-Cu-Zn (Fig. 1), que tiene relevancia debido a que dentro de esta zona se encuentra la zona eutéctica, que ha sido objeto de interés debido a sus propiedades superplásticas (Cáceres et al, 1987;Cáceres et al, 1990;Ramos et al, 2012).…”