Quantitative determination of homogeneous strain value in superplastic tension |
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Authors: | Yuquan Song Shumei Liu Lei Hou |
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Institution: | (1) Superplastic and Plastic Research Institute, Jilin University, 130025 Changchun, China |
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Abstract: | After load instability, a passage of homogeneous strain ε can be still continued in superplastic tensile deformation. But
untill now, no one has given the precise value of ε corresponding to actual materials, neither in experimental measurements
nor in theoretical calculations. Using the elaborate experimental measuring methods of m value and its function expressions, the note first gives the method to determine homogeneous ε, and the homogeneous ε value
of typical superplastic alloy Zn-5% Al under 18°C and 340°C respectively. |
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Keywords: | superplastic tension load instability homogeneous strain |
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