Abstract
In the present study, pre-compressive test, re-compressive test or reverse tensile test were carried out on the extruded ZK21 alloy to investigate the twinning and detwinning behaviors after induction quenching. The influence of quenching temperature and the pre-strain levels on mechanical behavior was systematically addressed. It is found that the growth and shrinkage of the previous twins generated by pre-compression are impeded for all samples after quenching and the extent of twin growth or shrinkage is closely related to the pre-strain levels. Induction quenching has little influence on twin nucleation during recompression, while the number of new nucleated twins decreases dramatically with the increase of pre-strain levels for all the samples. Meanwhile, our results also show that quenching temperature and pre-strain levels generate quite different effects on the re-compressive yield strength and the reverse tensile yield strength. Correspondingly, the influence of twin behavior on mechanical properties was discussed.
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