Unified modeling of flow behavior and microstructure evolution in hot forming of a Ni-based superalloy

Tang, Xuefeng; Wang, Baoyu; Huo, Yuanming; Ma, Wan-Chun; Zhou, Jing; Ji, Hongchao; Fu, Xiao‐An

doi:10.1016/j.msea.2016.03.044

Cited by 76 publications

(23 citation statements)

References 37 publications

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“…It is found that the shear band induced by uniaxial compression is much weaker than that induced by plain strain compression. It is worth noting that the Inconel 718 superalloy used in the present work has the similar material properties with those Ni-based superalloys investigated in the references [17,21], and mechanical testing was performed on similar experimental conditions by using Gleeble thermomechanical simulators. Therefore, the distinctive deformation mode of plane strain compression is expected to be the key factor for the intense occurrence of shear bands.…”

Section: Initiation Of Shear Bandsmentioning

confidence: 99%

The Formation and Evolution of Shear Bands in Plane Strain Compressed Nickel-Base Superalloy

Tang

Xiang

Liu

et al. 2018

Metals

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The formation and evolution of shear bands in Inconel 718 nickel-base superalloy under plane strain compression was investigated in the present work. It is found that the propagation of shear bands under plane strain compression is more intense in comparison with conventional uniaxial compression. The morphology of shear bands was identified to generally fall into two categories: in "S" shape at severe conditions (low temperatures and high strain rates) and "X" shape at mild conditions (high temperatures and low strain rates). However, uniform deformation at the mesoscale without shear bands was also obtained by compressing at 1050 • C/0.001 s −1 . By using the finite element method (FEM), the formation mechanism of the shear bands in the present study was explored for the special deformation mode of plane strain compression. Furthermore, the effect of processing parameters, i.e., strain rate and temperature, on the morphology and evolution of shear bands was discussed following a phenomenological approach. The plane strain compression attempt in the present work yields important information for processing parameters optimization and failure prediction under plane strain loading conditions of the Inconel 718 superalloy.dangerous factor for deformation and may result in localized deformation and local failure. It not only can significantly degrade the mechanical properties of alloys, but also can lead to the final failure of the component due to the shear-induced cracking. Therefore, a new insight of the flow characteristics at various deformation conditions during hot-working process is of great importance in controlling deformation, and contributing to obtain desirable components.Up to now, many studies focused on the flow instability of alloys by means of isothermal uniaxial compression [10][11][12]. However, only few investigations primarily concerned with the flow behavior under the plane strain compression [13]. In the present study, the deformation behavior of Inconel 718 superalloy in generalized plane strain conditions subjected to pressure and elevated temperature is investigated and discussed. The effect of processing parameters on shear band propagation and unstable plastic was studied by analyzing the flow curves and microstructures. Furthermore, the finite element method (FEM) [14,15] was employed to interpret the occurrence and evolution of shear bands during the compression process. The present work for Inconel 718 superalloy yields important information for the optimizing of processing parameters and failure prediction under plane strain conditions.

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Section: Initiation Of Shear Bandsmentioning

confidence: 99%

The Formation and Evolution of Shear Bands in Plane Strain Compressed Nickel-Base Superalloy

Tang

Xiang

Liu

et al. 2018

Metals

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“…Zuo et al [24] established artificial neural network model and Arrhenius-type constitutive equation to reconstruct the high-temperature deformation behaviors of as-cast N08028 alloy. Tang et al [ 25] proposed the unified internal-state-variable based constitutive equations for the high-temperature deformation behavior and microstructural evolution of Inconel 718 superalloy. Zhao et al [26] found that the dynamic recovery plays the main role in the dynamic softening behavior of GH3128 superalloy.…”

Section: Introductionmentioning

confidence: 99%

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

117

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“…Thus, it is valuable to understand the flow behaviors and microstructural evolution in the hot deformation of Inconel 718 alloy. In recent years, many efforts have been made to investigate the hot deformation behaviors of Inconel 718 alloy [7][8][9][10][11][12][13][14][15][16], and the previous studies are mainly focused on the flow behaviors, dynamic recrystallization (DRX), processing maps. However, little attention were paid on the second-phase precipitation during high-temperature deformation.…”

Section: Introductionmentioning

confidence: 99%

Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy

Zhang

Liu

et al. 2016

Materials Science and Engineering: A

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The precipitation behaviors of γ″ and δ phases during high-temperature isothermal compressive deformation of Inconel 718 alloy are investigated under the strain rate of 2.2·10 -4 s -1 . It is found that the precipitation behaviors are tailored by deformation temperatures, and lead to the disparately abnormal deformation characteristics. Under the deformation temperature of 800 o C, the microstructure is composed of incoherent needle-shaped γ″ precipitates at grain boundaries and ultrafine spherical γ″ particles within grains, resulting in the exceptional decrease of flow stress with absence of DRX. When deformed at 900 o C, it becomes needle-shaped δ precipitates at grain boundaries and intragranular disc-shaped γ″ precipitates, and the DRX softening degree is lowered consequently.

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Unified modeling of flow behavior and microstructure evolution in hot forming of a Ni-based superalloy

Cited by 76 publications

References 37 publications

The Formation and Evolution of Shear Bands in Plane Strain Compressed Nickel-Base Superalloy

The Formation and Evolution of Shear Bands in Plane Strain Compressed Nickel-Base Superalloy

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

Precipitation behavior during high-temperature isothermal compressive deformation of Inconel 718 alloy

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