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July 26, 2026International Journal of Modern Physics B

Crystallographic orientation and hydrostatic pressure dependent elastic and stacking-fault properties of γ-Ni/γ′-Ni 3 Al phase interfaces: A comparative first-principles investigation

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Authors

HXHongtao XueTYTao YangLPLiang Peng

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Overview

First-principles calculations reveal pressure effects on elastic and stacking-fault properties of Ni-based superalloy interfaces, suggesting implications for high-temperature applications.

Key Points

  • This study investigates how hydrostatic pressure affects the elastic and stacking-fault properties of γ/γ′ interfaces in Ni-based superalloys.
  • First-principles calculations were performed on (001), (110), and (111) γ/γ′ interfaces within 0–50 GPa.
  • Comparative analysis with bulk phases γ-Ni and γ′-Ni3Al was conducted.
  • The γ/γ′ interfaces were mechanically stable under pressure with elastic constants and moduli increasing with pressure.
  • The (111) interface showed the greatest increase in axial stiffness, outperforming other orientations.
  • Pressure enhanced interfacial bonding as indicated by electron redistribution and rising dislocation energy barriers.

Cite This Study

Xue et al. (2026) studied this question.

synapsesocial.com/papers/6a65a468d3aea3239cd770e5https://doi.org/10.1142/s021797922650219x
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