@Article{icces.2023.09919,
AUTHOR = {Xueling Fan, Pin Lu, Xiaochao Jin},
TITLE = {A Crystal Plasticity Based Constitutive Model for the Temperature  Dependent Anomalous Behaviors of Nickel-Based Single-Crystal  Superalloy},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {25},
YEAR = {2023},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v25n2/53826},
ISSN = {1933-2815},
ABSTRACT = {Ni-based single crystal superalloys have been favored in the high-temperature service zones of aeroengine 
and gas turbine due to its excellent mechanical properties at high temperature. It is very significant to 
construct a constitutive model that can accurately capture the mechanical response of Ni-based single 
crystals for simulation analysis. In this work, a forest dislocation density-based single crystal plasticity 
constitutive model was developed to capture the mechanical behavior of Ni-based single crystals, including 
the temperature dependent anomalous yield and tension/compression asymmetry. Firstly, thermally 
activated cross-slip mechanism was introduced into the hardening model to describe the anomalous yield 
response. Secondly, the transformation of dislocation motion mode from shearing to by-passing was 
described by an empirical function considering temperature effect. Thirdly, non-Schmid stress tensors were 
introduced into the constitutive model to capture the tension/compression asymmetric phenomenon. 
Multiple strengthening mechanisms were considered in the model, including solid solution, precipitates and 
base metal. Furthermore, the evolution of microstructural features (such as dislocation density, etc.) and 
contribution of each mechanism to mechanical response with increasing temperature were further 
analyzed. The model has been implemented via crystal plasticity framework and can accurately predict the 
temperature dependent mechanical response of Ni-based single crystal superalloy. This work provides a 
valuable guidance for accurately describing and predicting the mechanical response of Ni-based single 
crystals superalloy.},
DOI = {10.32604/icces.2023.09919}
}