EBSD analysis of evolution of dynamic recrystallization grains and δ phase in a nickel-based superalloy during hot compressive deformation

Lin, Y.C.; He, Dao‐Guang; Chen, Mingsong; Chen, Xiaomin; Zhao, Chunyang; Ma, Xiang; Long, Zhili

doi:10.1016/j.matdes.2016.02.052

Cited by 238 publications

(36 citation statements)

References 51 publications

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“…A C C E P T E D ACCEPTED MANUSCRIPT 11 K. These phenomena confirm that the high deformation temperature promotes the DRX behavior for the studied superalloy [31]. From Fig.…”

Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 80%

“…Also, due to the pinning effect of δ phase, the DRX grain boundary migration can hardly proceed, which further prevents the growth of DRX grain [31]. Therefore, the DRX grain size of the aged superalloy is smaller than that of the annealed superalloy, as shown in Fig.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…You et al [30] studied the effects of solution temperature on the microstructure and hardness of the electron beam smelted Inconel 740 superalloy. Lin et al [31] clarified that δ phase could accelerate the formation and rotation of subgrains of GH4169 superalloy. Jiang et al [32] analyzed the evolution of twins and substructures in hot deformation, and found that the dominant nucleation mechanism for Inconel 617B superalloy is original grain boundary bulging at low strain rates.…”

Section: Introductionmentioning

confidence: 99%

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A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

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120

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“…A C C E P T E D ACCEPTED MANUSCRIPT 11 K. These phenomena confirm that the high deformation temperature promotes the DRX behavior for the studied superalloy [31]. From Fig.…”

Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 80%

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

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120

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“…7, high angle grain boundaries (HAGBs), low angle grain boundaries (LAGBs) and δ phases are shown by thick-black lines, thin-gray lines and green dots, respectively. Here, HAGBs and LAGBs are identified by coincident site lattice (CSL) model [32,49]. From Fig.…”

Section: Flow Softening Behaviormentioning

confidence: 99%

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Lin

Chen

et al. 2016

Archives of Metallurgy and Materials

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The flow softening behaviors of a nickel-based superalloy with δ phase are investigated by hot compression tests over wide ranges of deformation temperature and strain rate. Electron backscattered diffraction (EBSD), optical microscopy (OM), and scanning electron microscopy (SEM) are employed to study the flow softening mechanisms of the studied superalloy. It is found that the flow softening behaviors of the studied superalloy are sensitive to deformation temperature and strain rate. At high strain rate and low deformation temperature, the obvious flow softening behaviors occur. With the increase of deformation temperature or decrease of strain rate, the flow softening degree becomes weaken. At high strain rate (1s−1), the flow softening is mostly induced by the plastic deformation heating and flow localization. However, at low strain rate domains (0.001-0.01s−1), the effects of deformation heating on flow softening are slight. Moreover, the flow softening at low strain rates is mainly induced by the discontinuous dynamic recrystallization and the dissolution of δ phase (Ni3Nb).

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“…It can be even found the phenomenon of recrystallization grains growth, Figure 6d. This phenomenon could be attributed to, on the one hand, dislocation motion and crystal slip become easy due to the increased average kinetic energy of atoms at relatively high deformation temperatures [33]; on the other hand, the higher temperatures promote the grain boundaries migration mobility, which facilitates the nucleation and growth of dynamic recrystallization grains [20]. In summary, the degree of dynamic recrystallization increases with the deformation temperature increases, and decreases with the strain rate increases.…”

Section: Microstructural Evolutionsmentioning

confidence: 99%

Deformation behavior and constitutive model for high temperature compression of a newly type of Ni₃Al‐based superalloy

Zhong

Liu

et al. 2019

Materialwissenschaft Werkst

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In order to investigate the hot deformation mechanism of a newly development Ni3Al‐based superalloy, hot compression tests at temperatures between 1100 °C–1250 °C and the strain rates of 0.001 s−1–1.0 s−1 were conducted. The results show that the curves of true stress‐strain indicate the thermal deformation is a typical dynamic recrystallization process, which the peak stresses and steady‐state stresses increase with decreasing temperatures and increasing strain rates. The softening mechanism is mainly dynamic recrystallization. The experimental data of peak stresses and steady‐state stresses is employed to calculate the constants in the Arrhenius equation. The steady‐state stresses are considered more reasonable for solving the parameters in the Arrhenius equation. Based on the constitutive equation obtained, the calculated values of steady‐state stresses match well with the experimental values at the strain rates of 0.001 s−1, 0.01 s−1 and 0.1 s−1, whereas there exists much deviation at 1.0 s−1. For the sake of accuracy of predicted results at 1.0 s−1 strain rate, a modified Zener‐Hollomon parameter Z’ is introduced. The results show that the modified constitutive equations established in this study could well predict the value of steady‐state stress in hot deformation of the newly development Ni3Al‐based alloy.

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EBSD analysis of evolution of dynamic recrystallization grains and δ phase in a nickel-based superalloy during hot compressive deformation

Cited by 238 publications

References 51 publications

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Deformation behavior and constitutive model for high temperature compression of a newly type of Ni₃Al‐based superalloy

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EBSD analysis of evolution of dynamic recrystallization grains and δ phase in a nickel-based superalloy during hot compressive deformation

Cited by 238 publications

References 51 publications

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Study of Flow Softening Mechanisms of a Nickel-Based Superalloy With Δ Phase

Deformation behavior and constitutive model for high temperature compression of a newly type of Ni3Al‐based superalloy

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Product

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Deformation behavior and constitutive model for high temperature compression of a newly type of Ni₃Al‐based superalloy