Characterization of the Hot Deformation Behavior of a Newly Developed Nickel-Based Superalloy

Shi, Zhaoxia; Yan, Xiaofeng; Duan, Chunhua; Tang, Cunjiang; Pu, Enxiang

doi:10.1007/s11665-018-3270-5

Cited by 13 publications

(16 citation statements)

References 46 publications

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“…Samples were also subjected to post-deformation annealing at the deformation temperature for times between 10 s and 2 h. It was demonstrated that under these conditions the grain size in the as-deformed state was only weakly dependent on the deformation parameters, but was mainly controlled by post-deformation annealing. Shi et al [24] investigated the hot deformation behavior of H282 at temperatures between 950 and 1210 • C, and strain rates between 0.01 and 10 s −1 , and concluded that the optimal hot working range is 1100-1180 • C and 0.01-0.1 s −1 , in order to produce a fine and uniform microstructure.…”

Section: Introductionmentioning

confidence: 99%

“…Notably, all these studies, with the exception of [24] were performed at deformation temperatures of 1100 • C or above, thus removing all or most of the grain boundary carbides during pre-deformation soaking, as the solvus for these carbides has been measured to be in the range 1100-1120 • C [25]. However, the pre-deformation soaking in [24] was performed at 1200 • C (above the grain boundary carbide solvus) and the time for stabilization at the deformation temperature below the solvus was only 180 s, which is not expected to lead to significant carbide precipitation. Thus, although testing was performed below the carbide solvus, no or only small amounts of grain boundary carbides would have been present.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic and Post-Dynamic Recrystallization of Haynes 282 below the Secondary Carbide Solvus

Eriksson

Colliander

2021

Metals

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Thermomechanical processes, such as forging, are important steps during manufacturing of superalloy components. The microstructural development during processing, which controls the final component properties, is complex and depends on e.g., applied strain, strain rate and temperature. In this study, we investigate the effect of process parameters on the dynamic and post-dynamic recrystallization during hot compression of Ni-base superalloy Haynes 282. Specifically, we address the effect of deformation below the grain boundary carbide solvus temperature. During deformation, discontinuous and continuous dynamic recrystallization was observed at the grain boundaries, and particle-stimulated nucleation occurred at primary carbides. Strain rate was determined to be the governing factor controlling the recrystallization fraction for strain rates up to 0.5 s−1 above which adiabatic heating became the dominating factor. Careful examination of the temperature development during deformation showed that the response of the closed-loop temperature control system to adiabatic heating can have important effects on the interpretation of the observed behavior. During a 90 s post-deformation hold, grain growth and an increasing fraction of twin boundaries significantly changed the deformation-induced microstructure and texture. The microstructure developed during post-dynamic recrystallization was mainly controlled by the temperature and only weakly coupled to the prior deformation step.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic and Post-Dynamic Recrystallization of Haynes 282 below the Secondary Carbide Solvus

Eriksson

Colliander

2021

Metals

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“…The processing domain in which dynamic recrystallization occurs is an ideal choice for hot working of the alloy since it not only develops stable flow and excellent workability but also restorates the microstructure. As is well known, dynamic recrystallization can disappear instable domains and improve hot deformability of the alloys [29,[39][40][41][42].…”

Section: Processing Maps and Their Relationship With Microstructural mentioning

confidence: 99%

“…In the above equation, Z is the Zenner-Hollomon parameter, _ e is the strain rate, Q is the activation energy of hot deformation, T is the absolute temperature (°K); R is the gas constant (8.314 J/ mol k), and F(σ) is a function of the materials flow stress. Three forms of Power, Exponential and Hyperbolic-sine laws can describe this function [11,12,16,20,29]:…”

Section: Constitutive Equationsmentioning

confidence: 99%

Hot deformation behavior and processing maps of iron‐nickel based superalloy

Fazilatpanah

Jahangiri

Khodabandeh

2019

Materialwissenschaft Werkst

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Hot deformation behavior of iron-nickel based superalloy (multimet N-155) was investigated by hot compression tests, carried out in the deformation temperature of 850°C-1150°C with strain rates of 0.001-0.1 s À 1 . The results showed that during the hot deformation of the alloy, under the same temperature, the flow stress rises with the increase of strain rate. At the same strain rate, the flow stress decreases with the increase of the temperature. The constitutive equations of the alloy that describe the flow stress as a function of strain rate and deformation temperature were established and the calculated apparent activation energy was 584.996 Kj/ mol. The results of metallographic analysis showed that the amount of dynamic recrystallization in the peak efficiency domain is higher than the other domains.The results also showed that by increase of deformation temperature and/or decrease of strain rate, the volume fraction of dynamic recrystallization increases. Processing maps under different strains were constructed for evaluation of flow instability regime and optimization of processing parameters. The optimum hot working window for alloy was obtained at the temperature range of 925°C-1050°C and strain rate of 0.001-0.003 s À 1 , with peak efficiency of 28 %.

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“…At present, research on superalloys has focused on a variety of aspects. Some studies have investigated the microstructure analysis and hot deformation behavior of nickel-based superalloys [1,2,3,4,5,6,7,8,9,10,11,12,13]. In these studies, optical microscopy (OM), transmission electron microscopy (TEM), electron backscatter diffraction (EBSD), and other analytical techniques were used to study the grain morphology, grain boundary evolution, and dynamic recrystallization nucleation mechanism of nickel-based superalloys under different hot deformation conditions.…”

Section: Introductionmentioning

confidence: 99%

Study of the Dynamic Recrystallization Process of the Inconel625 Alloy at a High Strain Rate

Jia

Gao

Ji³

et al. 2019

Materials

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High-temperature compression and electron backscatter diffraction (EBSD) techniques were used in a systematic investigation of the dynamic recrystallization (DRX) behavior and texture evolution of the Inconel625 alloy. The true stress–true strain curves and the constitutive equation of Inconel625 were obtained at temperatures ranging from 900 to 1200 °C and strain rates of 10, 1, 0.1, and 0.01 s−1. The adiabatic heating effect was observed during the hot compression process. At a high strain rate, as the temperature increased, the grains initially refined and then grew, and the proportion of high-angle grain boundaries increased. The volume fraction of the dynamic recrystallization increased. Most of the grains were randomly distributed and the proportion of recrystallized texture components first increased and then decreased. Complete dynamic recrystallization occurred at 1100 °C, where the recrystallized volume fraction and the random distribution ratios of grains reached a maximum. This study indicated that the dynamic recrystallization mechanism of the Inconel625 alloy at a high strain rate included continuous dynamic recrystallization with subgrain merging and rotation, and discontinuous dynamic recrystallization with bulging grain boundary induced by twinning. The latter mechanism was less dominant.

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Characterization of the Hot Deformation Behavior of a Newly Developed Nickel-Based Superalloy

Cited by 13 publications

References 46 publications

Dynamic and Post-Dynamic Recrystallization of Haynes 282 below the Secondary Carbide Solvus

Dynamic and Post-Dynamic Recrystallization of Haynes 282 below the Secondary Carbide Solvus

Hot deformation behavior and processing maps of iron‐nickel based superalloy

Study of the Dynamic Recrystallization Process of the Inconel625 Alloy at a High Strain Rate

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