Abstract
The present study was conducted to predict the hot deformation behavior of the as-forged Nitinol 60 shape memory alloy by using the Arrhenius type, multiple-linear, and artificial neural network (ANN) models. The acquired flow stress data from isothermal hot compression tests in a temperature range of 650–850 °C under strain rate range of 0.01–1 s−1 were used to calculate the material constants for establishing the corresponding constitutive equations. Furthermore, a comparative study has been made on the capability of the aforementioned models to predict the high-temperature deformation behavior by comparing the prediction relative errors, average absolute relative error, and correlation coefficient. The results show that multiple-linear model predicts the flow behavior more accurately than the Arrhenius type model. The ANN model is much more efficient and has a better prediction power for the as-forged Nitinol 60 alloy than both the Arrhenius type and multiple-linear models.
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ACKNOWLEDGMENTS
We would like to thank our anonymous reviewers for extremely helpful comments. We acknowledge the support from the National Natural Science Foundation of China (Grant No. 51164030) and Natural Science Foundation of Jiangxi Province (Grant No. 20122 BAB216018).
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Shu, X., Lu, S., Wang, K. et al. A comparative study on constitutive equations and artificial neural network model to predict high-temperature deformation behavior in Nitinol 60 shape memory alloy. Journal of Materials Research 30, 1988–1998 (2015). https://doi.org/10.1557/jmr.2015.144
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DOI: https://doi.org/10.1557/jmr.2015.144