Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression

Ning, Yongquan; Wang, T.; Fu, M.W.; Li, M. Z.; Wang, L.; Zhao, Chunyang

doi:10.1016/j.msea.2015.07.007

“…The preferred properties of Ni-Fe-Cr-base superalloys are highly related to the hot forming processes [3,4]. During hot forming, the DRX behaviors of Ni-Fe-Cr-base superalloys are highly intricate owing to the multiple alloying compositions [5,6,7,8]. Meanwhile, the complex microstructure, large deformation resistance, and narrow forming temperature range make hot forming processes very complicate [ 9 , 10 ].…”

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

¹

,

Lin

²

,

Zhou

³

2017

Vacuum

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…As a consequence, creep-fatigue is the dominant damaging mode for a turbine disc, which is the life limiting damage to be considered in the design of a turbine disc [1][2][3]. GH720Li (in Chinese series, similar to Udimet 720Li in the series of U.S.A), a Ni based γ′ strengthened superalloy, is one of the most successful superalloys for turbine discs for a long-term employ at 650-750°C due to its excellent creep, fatigue, oxidation and corrosion resistance at high temperatures [4,5]. Therefore, the creep-fatigue behavior of turbine discs of superalloy GH720Li is the focus of this investigation by performing creep-fatigue experiments with different dwell times at the maximum load.…”

Section: Introductionmentioning

confidence: 99%

Creep-fatigue behavior of turbine disc of superalloy GH720Li at 650 °C and probabilistic creep-fatigue modeling

Hu

¹

,

Ma

²

,

Shang

³

et al. 2016

Materials Science and Engineering: A

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…The bulging of initial grain boundaries is the main nucleation mechanism of dynamic recrystallization (DRX). Other studies have focused on the work-hardening behavior of nickel-based superalloys during hot deformation, and the constitutive model based on the stress–strain relationship [14,15,16,17,18,19,20,21,22,23,24,25]. The hot deformation behaviors of the Ni-based superalloy are investigated by tensile and compressional tests over a wide range of strain rates and deformation temperatures.…”

Section: Introductionmentioning

confidence: 99%

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

Jia

¹

,

Gao

²

,

Ji³

et al. 2019

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

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Competition between work-hardening effect and dynamic-softening behavior for processing as-cast GH4720Li superalloys with original dendrite microstructure during moderate-speed hot compression

Cited by 71 publications

References 34 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

Creep-fatigue behavior of turbine disc of superalloy GH720Li at 650 °C and probabilistic creep-fatigue modeling

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

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