Atomic mobility evaluation and diffusion matrix for fcc_A1 Co–V–W alloys

Shiyi Wen, Yong Du, Yuling Liu, Peng Zhou, Zi kui Liu

Research output: Contribution to journalArticle

Abstract

On the basis of measured interdiffusivity matrices from our previous research and thermodynamic descriptions, atomic mobilities for fcc_A1 Co–V–W alloys were evaluated by diffusion controlled transformation software. For the purpose of verifying the reliability of the present atomic mobilities, comparisons between the predicted data containing interdiffusivity matrices, composition profiles, as well as diffusion paths and the experimental ones were conducted. The results demonstrate that presently obtained atomic mobilities can reproduce experimental data reasonably. Furthermore, three-dimensional surfaces for the diagonal interdiffusivities at 1373, 1423 and 1473 K were plotted and were compared with measured ones, from which the pre-exponential factor and activation energy for elements V and W were then derived by means of Arrhenius equation. It is worth mentioning that all of the composition profiles and diffusion paths at three temperatures can be reasonably predicted by the present atomic mobilities containing only two ternary interaction parameters. Such a high simulation accuracy is rarely reported in the literature. The present atomic mobilities contribute to computational design for novel Co-based superalloys and multi-component cemented carbides.

Original languageEnglish (US)
Pages (from-to)13420-13432
Number of pages13
JournalJournal of Materials Science
Volume54
Issue number20
DOIs
StatePublished - Oct 30 2019

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Chemical analysis
Superalloys
Carbides
Activation energy
Thermodynamics
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Wen, Shiyi ; Du, Yong ; Liu, Yuling ; Zhou, Peng ; Liu, Zi kui. / Atomic mobility evaluation and diffusion matrix for fcc_A1 Co–V–W alloys. In: Journal of Materials Science. 2019 ; Vol. 54, No. 20. pp. 13420-13432.
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abstract = "On the basis of measured interdiffusivity matrices from our previous research and thermodynamic descriptions, atomic mobilities for fcc_A1 Co–V–W alloys were evaluated by diffusion controlled transformation software. For the purpose of verifying the reliability of the present atomic mobilities, comparisons between the predicted data containing interdiffusivity matrices, composition profiles, as well as diffusion paths and the experimental ones were conducted. The results demonstrate that presently obtained atomic mobilities can reproduce experimental data reasonably. Furthermore, three-dimensional surfaces for the diagonal interdiffusivities at 1373, 1423 and 1473 K were plotted and were compared with measured ones, from which the pre-exponential factor and activation energy for elements V and W were then derived by means of Arrhenius equation. It is worth mentioning that all of the composition profiles and diffusion paths at three temperatures can be reasonably predicted by the present atomic mobilities containing only two ternary interaction parameters. Such a high simulation accuracy is rarely reported in the literature. The present atomic mobilities contribute to computational design for novel Co-based superalloys and multi-component cemented carbides.",
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Atomic mobility evaluation and diffusion matrix for fcc_A1 Co–V–W alloys. / Wen, Shiyi; Du, Yong; Liu, Yuling; Zhou, Peng; Liu, Zi kui.

In: Journal of Materials Science, Vol. 54, No. 20, 30.10.2019, p. 13420-13432.

Research output: Contribution to journalArticle

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