Three-dimensional Phase-field simulation of γ″ precipitation kinetics in Inconel 625 during heat treatment

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.

Files

Metadata

Work Title Three-dimensional Phase-field simulation of γ″ precipitation kinetics in Inconel 625 during heat treatment
Access
Open Access
Creators
  1. Caleb O. Yenusah
  2. Yanzhou Ji
  3. Yucheng Liu
  4. Tonya W. Stone
  5. Mark F. Horstemeyer
  6. Long-Qing Chen
  7. Lei Chen
Keyword
  1. Phase-field model
  2. Precipitation kinetics
  3. Non-isothermal aging
  4. Nickel-base alloys
  5. Precipitation strengthening
  6. γ′′
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Computational Materials Science
Publication Date 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.commatsci.2020.110123
Deposited August 10, 2022

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Updated
  • Added Creator Sandra Elder
  • Added Three-dimensional Phase-field simulation of γ′′ precipitation kinetics in Inconel 625 during heat treatment.pdf
  • Updated Publication Date, License Show Changes
    Publication Date
    • 2021-02-01
    License
    • https://rightsstatements.org/page/InC/1.0/
  • Published
  • Updated Keyword, Publisher, Publisher Identifier (DOI), and 2 more Show Changes
    Keyword
    • Phase-field model, Precipitation kinetics, Non-isothermal aging, Nickel-base alloys, Precipitation strengthening, γ′′
    Publisher
    • Computational Materials Science
    Publisher Identifier (DOI)
    • https://doi.org/10.1016/j.commatsci.2020.110123
    Description
    • Metastable gamma '' (D0(22)-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 gamma '' 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 degrees C and 650 degrees C during isothermal aging. Utilizing the phase-field simulation results as input parameters, the coherency strengthening effect of gamma '' as a function of aging temperature and time is predicted. A multistage aging strategy to optimize the gamma '' strengthening effect and to reduce aging times using the developed phase-field model and coherency strengthening model is suggested.
    • 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.
    Publication Date
    • 2021-02-01
    • 2021
  • Deleted Creator Sandra Elder
  • Added Creator Caleb O. Yenusah
  • Added Creator Yanzhou Ji
  • Added Creator Yucheng Liu
  • Added Creator Tonya W. Stone
  • Added Creator Mark F. Horstemeyer
  • Added Creator Long-Qing Chen
  • Added Creator Lei Chen
  • Updated