Abstract
Multilayer Zn–Al eutectoid alloy (ZA22) was fabricated via accumulative roll bonding (ARB) for the first time, and the microstructural evolution, damping and tensile mechanical properties of the resultant specimens were studied. In the early stage of ARB, Zn–Al alloy layers were firstly formed between Zn and Al layers. With increasing the cycles of ARB, the volume fraction of the alloy layers increased gradually. After 9 cycles of ARB, the ZA22 alloy with uniform composition was obtained. Property tests showed that after 6 cycles of ARB, the damping in a wide temperature range from room temperature to around 275 °C, the tensile strength and the elongation to failure began to be higher than those of the cast ZA22 alloy. In particular, the elongation to failure of the ARB-7 specimen was 10.7 times that of the cast ZA22 alloy. Solution treatment could further significantly improve the damping and the elongation to failure. The microstructural origins of the improved properties were discussed in detail.
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