Physically Based Constitutive Model for Viscoplastic Deformation of Inconel718 at High Strain Rates and Temperatures
Publication: Journal of Aerospace Engineering
Volume 33, Issue 5
Abstract
In the cutting process of nickel-based superalloys, because of the high strain rate and cutting temperature, the cutting deformation is complex and there exist hardening and softening phenomena. Therefore, the present study developed a physically-based constitutive model, which represents the mechanical response of a material at a given microstructure in terms of dislocation glide to describe the deformation behaviors of Inconel718. The established model also describes evolution equations for internal variables characterizing the microstructure. The internal variables are related to the dislocation density. Comparisons between the experimental results and those predicted employing different models [a physically-based constitutive model has been established in the present work and Johnson–Cook (JC) constitutive model] indicate that the established model can accurately characterize the deformation behaviors for Inconel718 at high strain rates and temperatures.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work is supported by National Natural Science Foundation of China (51605043, 51505038).
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 5 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Mar 3, 2019
Accepted: Mar 9, 2020
Published online: May 31, 2020
Published in print: Sep 1, 2020
Discussion open until: Oct 31, 2020
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