TY - JOUR
T1 - Three-dimensional Phase-field simulation of γ″ precipitation kinetics in Inconel 625 during heat treatment
AU - Yenusah, Caleb O.
AU - Ji, Yanzhou
AU - Liu, Yucheng
AU - Stone, Tonya W.
AU - Horstemeyer, Mark F.
AU - Chen, Long Qing
AU - Chen, Lei
N1 - Funding Information:
This work is funded by the National Science Foundation (NSF), in United States under an award CMMI 1662854. The computer simulations were carried out on the clusters of High Performance Computing Collaboratory (HPC 2 ) at Mississippi State University. Lei Chen acknowledges the financial support by startup fund from Department of Mechanical Engineering at University of Michigan-Dearborn.
Funding Information:
This work is funded by the National Science Foundation (NSF), in United States under an award CMMI 1662854. The computer simulations were carried out on the clusters of High Performance Computing Collaboratory (HPC2) at Mississippi State University. Lei Chen acknowledges the financial support by startup fund from Department of Mechanical Engineering at University of Michigan-Dearborn. The raw/processed data required to reproduce these findings cannot be shared at this time due to technical or time limitations.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - Metastable γ″ (D022-Ni3Nb) particles are strengthening precipitates for commercial Inconel 625 Ni-based superalloy. Understanding their morphological evolution is critical for evaluating its hardening effects and guiding heat treatments to improve its yield strength. Here we present a phase-field model to model and analyze the nucleation and growth kinetics of metastable γ″ in Inconel 625 during isothermal and non-isothermal aging conditions with thermodynamic properties, diffusion coefficients, and misfit strain data from both the literature and calibration to experimental results. We implemented the classical nucleation theory to introduce local nucleation taking into account local supersaturation. The simulated mean particle length and aspect ratio are in agreement with experimental data at 600 °C and 650 °C during isothermal aging. Utilizing the phase-field simulation results as input parameters, the coherency strengthening effect of γ″ as a function of aging temperature and time is predicted. A multistage aging strategy to optimize the γ″ strengthening effect and to reduce aging times using the developed phase-field model and coherency strengthening model is suggested.
AB - Metastable γ″ (D022-Ni3Nb) particles are strengthening precipitates for commercial Inconel 625 Ni-based superalloy. Understanding their morphological evolution is critical for evaluating its hardening effects and guiding heat treatments to improve its yield strength. Here we present a phase-field model to model and analyze the nucleation and growth kinetics of metastable γ″ in Inconel 625 during isothermal and non-isothermal aging conditions with thermodynamic properties, diffusion coefficients, and misfit strain data from both the literature and calibration to experimental results. We implemented the classical nucleation theory to introduce local nucleation taking into account local supersaturation. The simulated mean particle length and aspect ratio are in agreement with experimental data at 600 °C and 650 °C during isothermal aging. Utilizing the phase-field simulation results as input parameters, the coherency strengthening effect of γ″ as a function of aging temperature and time is predicted. A multistage aging strategy to optimize the γ″ strengthening effect and to reduce aging times using the developed phase-field model and coherency strengthening model is suggested.
UR - http://www.scopus.com/inward/record.url?scp=85094870850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85094870850&partnerID=8YFLogxK
U2 - 10.1016/j.commatsci.2020.110123
DO - 10.1016/j.commatsci.2020.110123
M3 - Article
AN - SCOPUS:85094870850
SN - 0927-0256
VL - 187
JO - Computational Materials Science
JF - Computational Materials Science
M1 - 110123
ER -