Investigation on the influences of δ phase on the dynamic recrystallization of Inconel 718 through a modified cellular automaton model

Zhang, Fuxiang; Liu, Dong; Yu, Yanlong; Liu, Cuixia; Wang, Jianguo; Zhang, Zhe; Wang, Haiping

doi:10.1016/j.jallcom.2020.154590

Cited by 20 publications

(2 citation statements)

References 40 publications

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“…DA-4 experienced a pre-aging process for 48 h, which precipitated more δ phase. The δ phase can improve the nucleation rate during recrystallization and pin the grain boundaries [30,31].…”

Section: Mechanical Properties Of Different Heat Treatment Specimensmentioning

confidence: 99%

Effect of  phase precipitation on grain growth and mechanical properties of Inconel 718 prepared by selective laser melting

Na,

Mu,

Zhang

et al. 2024

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Selective laser melting (SLM) is widely used for forming metals due to its complexity in geometrical design. Defects are unavoidably introduced in the manufacturing process, which requires post-processing. But it leads to grain growth. In this work, a series of post-heat treatments were used to study the effect of δ phase precipitation on grain growth and mechanical properties in SLM Inconel 718. Optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the microstructure of the specimens. The results showed that the precipitation of the δ phase increased with increasing aging time and that the growth of grains was inhibited by the δ phase. After 750 • C pre-aging for 48 h, the solution-treated specimen had the optimum strength and plasticity.

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Section: Mechanical Properties Of Different Heat Treatment Specimensmentioning

confidence: 99%

Effect of  phase precipitation on grain growth and mechanical properties of Inconel 718 prepared by selective laser melting

Na,

Mu,

Zhang

et al. 2024

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“…It can promote DRX nucleation, but hinders the growth of DRX grains [32][33][34]. Zhang et al [35] delved into the influence of δ phases on DRX and improved the cellular automata (CA) model of DRX. Wen et al [36] developed a DRX kinetic model that considers the initial δ phase content.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Chen,

Cai,

Lin

et al. 2024

Materials

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Typically, in the manufacturing of GH4169 superalloy forgings, the multi-process hot forming that consists of pre-deformation, heat treatment and final deformation is required. This study focuses on the microstructural evolution throughout hot working processes. Considering that δ phase can promote nucleation and limit the growth of grains, a process route was designed, including pre-deformation, aging treatment (AT) to precipitate sufficient δ phases, high temperature holding (HTH) to uniformly heat the forging, and final deformation. The results show that the uneven strain distribution after pre-deformation has a significant impact on the subsequent refinement of the grain microstructure due to the complex coupling relationship between the evolution of the δ phase and recrystallization behavior. After the final deformation, the fine-grain microstructure with short rod-like δ phases as boundaries is easy to form in the region with a large strain of the pre-forging. However, necklace-like mixed grain microstructure is formed in the region with a small strain of the pre-forging. In addition, when the microstructure before final deformation consists of mixed grains, dynamic recrystallization (DRX) nucleation behavior preferentially depends on kernel average misorientation (KAM) values. A large KAM can promote the formation of DRX nuclei. When the KAM values are close, a smaller average grain size of mixed-grain microstructure is more conductive to promote the DRX nucleation. Finally, the interaction mechanisms between δ phase and DRX nucleation are revealed.

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Effects of Pre-Deformation and Heat Treatment on the Microstructure and Mechanical Properties of Cu-2.5Be Sheets

Liu

Chen

Zhu

et al. 2020

J. of Materi Eng and Perform

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Investigation on the influences of δ phase on the dynamic recrystallization of Inconel 718 through a modified cellular automaton model

Cited by 20 publications

References 40 publications

Effect of  phase precipitation on grain growth and mechanical properties of Inconel 718 prepared by selective laser melting

Effect of  phase precipitation on grain growth and mechanical properties of Inconel 718 prepared by selective laser melting

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Effects of Pre-Deformation and Heat Treatment on the Microstructure and Mechanical Properties of Cu-2.5Be Sheets

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