Phase-field modeling of θ′ precipitation kinetics in W319 alloys

Yanzhou Ji, Bita Ghaffari, Mei Li, Long Qing Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Understanding and predicting the morphology, kinetics and hardening effects of precipitates are critical in improving the mechanical properties of Al-Cu-based alloys through controlling the temperature and duration of the heat treatment process. In this work, we present a comprehensive phase-field framework for simulating the kinetics of θ′ precipitates in W319 alloys, integrating the thermodynamic and diffusion mobility databases of the system, the key precipitate anisotropic energy contributions from literature and first-principles calculations, as well as a nucleation model based on the classical nucleation theory. By systematically performing phase-field simulations, assuming the precipitate peak number densities determined from experiments, we optimize the model parameters to obtain the best possible match to the average diameters, thicknesses and volume fractions of precipitates from experimental measurements at 190, 230 and 260 °C. With these parameters available, the phase-field simulations can be performed at other aging temperatures. The possible extensions of the current phase-field model for more accurate prediction of the precipitate behaviors in W319 alloys will also be discussed.

Original languageEnglish (US)
Title of host publicationProceedings of the 4th World Congress on Integrated Computational Materials Engineering, ICME 2017
EditorsPaul Mason, Georg J. Schmitz, Amarendra K. Singh, Charles R. Fisher, Alejandro Strachan, Ryan Glamm, Michele V. Manuel
PublisherSpringer International Publishing
Pages293-304
Number of pages12
ISBN (Print)9783319578637
DOIs
StatePublished - Jan 1 2017
Event4th World Congress on Integrated Computational Materials Engineering, ICME 2017 - Ypsilanti, United States
Duration: May 21 2017May 25 2017

Publication series

NameMinerals, Metals and Materials Series
VolumePart F4
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Other

Other4th World Congress on Integrated Computational Materials Engineering, ICME 2017
CountryUnited States
City Ypsilanti
Period5/21/175/25/17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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    Ji, Y., Ghaffari, B., Li, M., & Chen, L. Q. (2017). Phase-field modeling of θ′ precipitation kinetics in W319 alloys. In P. Mason, G. J. Schmitz, A. K. Singh, C. R. Fisher, A. Strachan, R. Glamm, & M. V. Manuel (Eds.), Proceedings of the 4th World Congress on Integrated Computational Materials Engineering, ICME 2017 (pp. 293-304). (Minerals, Metals and Materials Series; Vol. Part F4). Springer International Publishing. https://doi.org/10.1007/978-3-319-57864-4_27