Abstract
The currently used methods of determining strain-rate sensitivities,m, of superplastic alloys from strain-rate change tests are examined and found to be unsatisfactory. The stressrelaxation method is also investigated and is shown to be applicable to the superplastic Al-Cu eutectic. However, them-values derived by this method, and by a variant of the strain-rate change technique, are significantly lower than those obtained using the conventional strain-rate change tests and this is explained in terms of microstructural factors.
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Hedworth, J., Stowell, M.J. The measurement of strain-rate sensitivity in superplastic alloys. J Mater Sci 6, 1061–1069 (1971). https://doi.org/10.1007/BF00980604
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DOI: https://doi.org/10.1007/BF00980604