Hot tensile deformation behaviors and fracture characteristics of a typical Ni-based superalloy

Lin, Y.C.; Deng, Jiao; Jiang, Yi; Wen, Dong-Xu; Guan, Lan

doi:10.1016/j.matdes.2013.10.071

Cited by 164 publications

(44 citation statements)

References 48 publications

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“…Further, the fracture strain tends to increase with increasing strain rate but decreasing deformation temperature. With decreasing strain rate, the time for the energy accumulation was prolonged, while the mobility of the grain boundaries and atoms increased with the temperature; this makes annihilation of dislocations, nucleations, and DRX growth much easier and thus results in a decrease in the flow stress [21].…”

Section: Hot Tensile Behaviormentioning

confidence: 99%

Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

Xiao

Huang

Liu

et al. 2016

Metals

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Abstract:To better understand the tensile deformation and fracture behavior of 35CrMo steel during hot processing, uniaxial tensile tests at elevated temperatures and strain rates were performed. Effects of deformation condition on the flow behavior, strain rate sensitivity, microstructure transformation, and fracture characteristic were characterized and discussed. The results indicated that the flow stress was sensitive to the deformation condition, and fracture occurs immediately after the peak stress level is reached, especially when the temperature is low or the strain rate is high. The strain rate sensitivity increases with the deformation temperature, which indicates that formability could improve at high temperatures. Photographs showing both the fracture surfaces and the matrix near the fracture section indicated the ductile nature of the material. However, the fracture mechanisms varied according to the deformation condition, which influences the dynamic recrystallization (DRX) condition, and the DRX was accompanied by the formation of voids. For samples deformed at high temperatures or low strain rates, coalescence of numerous voids formed in the recrystallized grains is responsible for fracture, while at high strain rates or low temperatures, the grains rupture mainly by splitting because of cracks formed around the inclusions.

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Section: Hot Tensile Behaviormentioning

confidence: 99%

Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

Xiao

Huang

Liu

et al. 2016

Metals

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“…Thus, the fine γ' precipitation is mainly controlled by the cooling conditions, while the grain structure is controlled by dynamic and post-dynamic recrystallization occurring during hot forging and cooling, respectively. Kinetics of static [1], dynamic [2,3,4,5,6,7], and post-dynamic [8,9,10] recrystallization in Nickel-based superalloys have already been addressed in the literature.…”

Section: Introductionmentioning

confidence: 99%

On the Coupling between Recrystallization and Precipitation Following Hot Deformation in a γ-γ′ Nickel-Based Superalloy

Seret

Moussa

Bernacki

et al. 2018

Metall Mater Trans A

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Post-dynamic recrystallization and γ' precipitation during cooling from γ' supersolvus temperature after hot compression have been studied in the AD730 TM γ-γ' Nickel-based superalloy. Emphasis was given not only on both phenomena as distinct mechanisms but also on their mutual influence in terms of physical mechanisms. The growth of γ'precipitates is hastened in the unrecrystallized grains compared to the recrystallized ones.This could possibly be attributed to the higher dislocation content acting as highdiffusivity paths. Post-dynamic recrystallization is not prevented by Smith-Zener pinning of the recrystallization front by the γ' precipitates. Instead, the recrystallization front dissolves γ' precipitates which then reprecipitate discontinuously or continuously, and coherently with the surrounding γ matrix in the recrystallized grains.

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“…Due to the pinning effect, d phase can inhibit the movement of dislocations during hot deformation [59]. The energy barrier for the further movement of dislocations increases with the increase of d phase.…”

Section: Effects Of Pre-treatment On Constitutive Equationsmentioning

confidence: 99%

Effect of pre-treatment on hot deformation behavior and processing map of an aged nickel-based superalloy

Lin

Chen

et al. 2015

Journal of Alloys and Compounds

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Hot tensile deformation behaviors and fracture characteristics of a typical Ni-based superalloy

Cited by 164 publications

References 48 publications

Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

On the Coupling between Recrystallization and Precipitation Following Hot Deformation in a γ-γ′ Nickel-Based Superalloy

Effect of pre-treatment on hot deformation behavior and processing map of an aged nickel-based superalloy

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