High-temperature deformation behavior and processing map of the as-cast Inconel 625 alloy

Jia, Zhi; Gao, Zexi; Ji, Jin-Jin; Liu, Dexue; Guo, Tao; Ding, Yutian

doi:10.1007/s12598-020-01474-6

Cited by 23 publications

(9 citation statements)

References 25 publications

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“…It is worth noting that compared with other studies [36,37], the deformation activation energy of this experiment is low. Deformation activation energy is usually considered to reflect the difficulty of plastic deformation, and there are many influencing factors, such as microstructure (initial grain size, dislocation pinning effect [38], and the concurrent dynamic precipitation [35]) and deformation conditions (temperature [39], strain rate [40], and accumulated deformation [41]).…”

Section: The Establishment and Solution Of Constitutive Modelcontrasting

confidence: 56%

“…This also reduces the deformation activation energy of the alloy. On the other hand, compared with the literature [ 36 , 37 ], the experiment in this paper is mainly carried out in the range of low strain rate, and the maximum strain rate is 0.05 s −1 , which is far lower than 10 s −1 in the above literature. High strain rate will cause a large number of dislocation entanglement, resulting in the increase of deformation activation energy.…”

Section: Resultsmentioning

confidence: 99%

“…High strain rate will cause a large number of dislocation entanglement, resulting in the increase of deformation activation energy. In addition, compared with the as-cast plate selected in the literature [ 36 , 37 ], the rolled plate was selected and annealed at 1150 °C for 50 min. The obtained equiaxed microstructure has low deformation resistance.…”

Section: Resultsmentioning

confidence: 99%

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Thermal Processing Map and Microstructure Evolution of Inconel 625 Alloy Sheet Based on Plane Strain Compression Deformation

Song

Fan

et al. 2021

Materials

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Plane strain compression tests were used to study the deformation behavior of an Inconel 625 alloy sheet at various temperatures and strain rates. The peak stress was selected to establish the constitutive equation, and the processing maps under different strains were drawn. The results show that the effective stress–strain curve of Inconel 625 has typical dynamic recrystallization (DRX) characteristics. With the increasing deformation temperature and the decreasing strain rate, the softening effect is significantly enhanced. The parameters of the constitutive equation are calculated, and the average error of the constitutive equation is 5.68%. Through the analysis of the processing map, a deformation temperature of 950–960 °C with a strain rate of 0.007–0.05 s−1 were determined as the unstable region, and obvious local plastic-rheological zones were found in the unstable region. The optimum deformation condition was found to be 1020–1060 °C/0.005–0.03 s−1. Through electron backscattered diffraction (EBSD) characterization, it was found that both the increase of temperature and the decrease of strain rate significantly promote the recrystallization process. At a low strain rate, the main recrystallization mechanism is discontinuous dynamic recrystallization (DDRX). It is expected that the above results can provide references for the optimization of the rolling process and microstructure control of an Inconel 625 alloy sheet.

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Section: The Establishment and Solution Of Constitutive Modelcontrasting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Thermal Processing Map and Microstructure Evolution of Inconel 625 Alloy Sheet Based on Plane Strain Compression Deformation

Song

Fan

et al. 2021

Materials

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“…Mechanical properties are the properties of a metal material to resist damage under load. For example, investigating the alloys mechanical properties, the stress-strain relationship is generally discussed due to the stability of their compressive contact area [17][18][19]. Due to the irregularity of plant seed morphology, the mechanical properties are generally characterized by the initial shell breaking force, displacement, or compression force.…”

Section: Extrusion Pressure-time Curve and In-situ Observation Of Castor Seed Coatmentioning

confidence: 99%

Research on Structural–Mechanical Properties during the Castor Episperm Breaking Process

et al. 2021

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Products from castor seeds have been widely used in various fields. In order to study the breaking behavior and rupture mechanism of castor seed episperm during coat shelling process, the force-structure property of coating castor seed was investigated by a self-developed texture analyzer with in situ optical microscopic observation. Influences of compression distance, velocity and working temperature were studied. The results showed that castor seed episperm rupture commonly happened from the tail end to the first end. Compression distance effect can change the episperm cracking degree. Under pressing distance 2–3 mm, the episperm easily cracked into two flaps, and the breaking force stabilized at 77 N. Pressing velocity has no significant effect on episperm breaking. Temperature changes the physical property. With an increase in temperature, breaking force presents a “slope” decline; under a temperature of 120 ℃, temperature effect on the breaking force decreased significantly and the breaking force fell to about 52 N. The research results can provide theoretical basis for the castor episperm peeling.

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“…The hot deformation behavior, texture, DRX nucleation, and annealing twin boundary of inconel 625 alloy during hot compression have been studied comprehensively by the authors in previous works. [27][28][29][30] Nevertheless, SFs and dislocations, which are common deformation processes in Inconel 625 during hot deformation, have a significant impact on microstructural evolution. As a result, it is critical to investigate the evolution of SFs and dislocations during DRX to provide support for a microstructure with improved overall characteristics.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Stacking Fault and Dislocation during Dynamic Recrystallization of Inconel 625 Alloy

Wang

Jia

et al. 2022

Adv Eng Mater

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The purpose herein is to improve the understanding of microstructure evolution of inconel 625 alloy during the dynamic recrystallization (DRX) process. Herein, the evolution process of DRX is determined by the grain orientation spread (GOS) method, and 1100 °C is determined as the complete recrystallization temperature. Electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) techniques are used to investigate the density and morphology of dislocations and stacking faults (SFs), as well as the effects of dislocations and SFs during recrystallization. With increasing recrystallization fraction, the density of dislocations and SFs decreases gradually, the dislocation start is extended, and SFs appear on other crystal planes. The existence of dislocation and SF increases the nucleation energy and nucleation sites of recrystallization, respectively, which is beneficial to the nucleation of DRX.

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High-temperature deformation behavior and processing map of the as-cast Inconel 625 alloy

Cited by 23 publications

References 25 publications

Thermal Processing Map and Microstructure Evolution of Inconel 625 Alloy Sheet Based on Plane Strain Compression Deformation

Thermal Processing Map and Microstructure Evolution of Inconel 625 Alloy Sheet Based on Plane Strain Compression Deformation

Research on Structural–Mechanical Properties during the Castor Episperm Breaking Process

Evolution of Stacking Fault and Dislocation during Dynamic Recrystallization of Inconel 625 Alloy

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