Evolution of microstructure and δ phase in an aging-treated nickel-based superalloy during hot compression

Yan, PeiZhi; Wen, Dong-Xu; Liu, Yang; Huang, Liang; Yang, Xiaoli; Zhang, Zhicheng; Xu, FuZe; Li, Jianjun

doi:10.1016/j.matchar.2023.112876

Cited by 12 publications

(2 citation statements)

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“…In addition, most of the needle-like δ-phase in the grain stop at the grain boundary without crossing it in the original direction. This may be due to the different lattice orientations among different grains, which block the precipitation of δ-phase along the crystal plane at the distorted lattice region at the grain boundary [8], In general, the amount of precipitated δ-phase increases with aging time, which follows approximately the Avrami equation (equation ( 1)) [29]…”

Section: Models For δ-Phase Precipitation During Hot Agingmentioning

confidence: 99%

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Simulation of δ-phase precipitation behavior in hot compression deformation of inconel 718 superalloy

Kong,

Jin,

Liu

et al. 2024

Mater. Res. Express

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A model for δ-phase precipitation in Inconel 718 superalloy during hot working, grounded in experimental data, was developed. A Cellular Automata (CA) simulation platform was designed to simulate the precipitation of second-phase particles in the alloy. The δ-phase precipitation behavior of Inconel 718 alloy during hot aging and hot compression was simulated. The results revealed that during hot aging, δ-phase initially precipitated on grain boundaries as particles and short rods, followed by the formation of long needle-like δ-phase with similar growth direction within grains. During hot compression deformation, flat needle-like δ-phase gradually dissolved and transformed into short rods and granular forms dispersed around grain boundaries as thermal deformation temperature increased. The simulation results for δ-phase content, morphology, and distribution were in good agreement with experimental results, demonstrating the model’s strong predictive potential for second-phase evolution.

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Section: Models For δ-Phase Precipitation During Hot Agingmentioning

confidence: 99%

“…It first precipitates on grain and twin boundaries before gradually appearing within crystals as aging time increases. The precipitate morphology is mainly needle-like [6][7][8].…”

Section: Introductionmentioning

confidence: 99%