Abstract
The stress-strain rate behaviour of a superplastic Zn-22% Al alloys was investigated by the differential strain rate and constant load cycling tests on an Instron machine. A region with a rate sensitivity approaching unity was observed at low strain rates. On increasing the strain rate, a transition to the superplastic region occurred through an intermediate region of lower m (∼0.35). These observations are interpreted in terms of a transition from diffusional creep to superplastic flow with a threshold stress for superplastic deformation.
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Mishra, R.S., Murty, G.S. The stress-strain rate behaviour of superplastic Zn-Al eutectoid alloy. J Mater Sci 23, 593–597 (1988). https://doi.org/10.1007/BF01174691
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DOI: https://doi.org/10.1007/BF01174691