Influence of heat treatment regimes on microstructure and creep properties of FGH95 nickel base superalloy

Xie, Jun; Zhou, Xiaoming; Yu, Xingfu; Wu-xiang, Wang

doi:10.1016/j.msea.2012.01.049

Cited by 22 publications

(6 citation statements)

References 10 publications

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“…Oxygen content is one of the most important factors to monitor in powders because its content directly affects the precipitation of carbides on Prior Particle Boundaries (PPB) after solidification has occurred. PPBs typically act as crack initiation sites which lower the mechanical properties, especially ductility [8][9][10]. Moreover, the PPB networks are practically impossible to be eliminated after their precipitation.…”

Section: Introductionmentioning

confidence: 99%

Effect of the particle size distribution on physical properties, composition, and quality of gas atomized Astroloy powders for HIP application

Bassini

Napal

Biurrun

et al. 2022

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Effect of the particle size distribution on physical properties, composition, and quality of gas atomized Astroloy powders for HIP application

Bassini

Napal

Biurrun

et al. 2022

Journal of Alloys and Compounds

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“…This has been considered to be one main reason that creep fracture occurs during service at high temperatures [18,19]. Research on the high-temperature creep rupture of FGH95 powder nickel-based alloys showed that crack initiation and propagation along the grain boundaries are the creep rupture mechanism of the alloy [20,21].…”

Section: Introductionmentioning

confidence: 99%

Creep Damage and Deformation Mechanism of a Directionally Solidified Alloy during Moderate-Temperature Creep

Tian

Fang

et al. 2021

Crystals

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Through creep performance tests, microstructural observations, and contrast analysis of the dislocation configuration, the deformation and damage mechanism of the directionally solidified nickel-based superalloy during creep at moderate temperatures was investigated. The findings suggested that the deformation of the alloy in the late stage of creep at moderate temperatures involved dislocations slipping in the γ matrix and shearing into the γ′ phase. The super-dislocations sheared into the γ′ phase could either be decomposed to form a <112> super-Shockley incomplete dislocation plus superlattice intrinsic stacking fault (SISF) configuration, or it could slip from the {111} plane to the {100} plane and decompose to form a dislocation configuration of the Kear–Wilsdorf (K-W) lock plus antiphase domain boundary (APB). The configurations of the dislocations could inhibit the slipping and cross-slipping of dislocations to enhance the alloy creep strength, which is thought to be one reason that the alloy displayed good creep resistance. In the late creep stage, the primary/secondary slipping systems were alternately activated, and the interaction of the slipping traces caused micro-holes to appear on the interface of the γ/γ′ phases at the intersection areas of the two slipping systems. The micro-holes gathered and grew to form micro-cracks, which extended along the grain boundary at 45° to the stress axis until creep rupture occurred. These were the damage and fracture characteristics of the alloy in the late stage of creep at moderate temperatures.

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“…In addition, some nickel-based superalloys, such as Inconel 718 [6][7][8][9], Inconel X-750 [10][11][12], and Hastelly C276 [13], which are frequently employed at elevated temperatures, also become a promising candidate for manufacturing a workpiece at cryogenic temperatures because of their high structure stability, excellent ductility, high toughness, high corrosion resistance, and especially high elastic limit under cryogenic environments. Heat treatment significantly influences the microstructures of nickel-based superalloys, which further affect the corresponding mechanical properties [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

Jiang

Sun

Zhang

et al. 2018

Metals

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Abstract:As-cast NiCuCrMoTiAlNb nickel-based alloys were subjected to two-stage heat treatment, including solution treatment and subsequent aging treatment. Furthermore, the influence of heat treatment on microstructures and mechanical properties of NiCuCrMoTiAlNb nickel-based alloys was further investigated. The as-cast NiCuCrMoTiAlNb Ni-based alloys are able to experience large plastic deformation at room temperature, where nanocrystalline phases are induced. In the case of heat-treated NiCuCrMoTiAlNb nickel-based alloys, with increasing Nb content, plenty of Ni 3 (Al, Ti) precipitates (γ phases) are distributed in the γ matrix and they are able to become the obstacles to impede the movement of dislocations, which is responsible for increasing the yield strength of NiCuCrMoTiAlNb nickel-based alloys. Pile-up of dislocations in the vicinity of γ precipitates adversely influences plasticity of NiCuCrMoTiAlNb nickel-based alloys.

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Influence of heat treatment regimes on microstructure and creep properties of FGH95 nickel base superalloy

Cited by 22 publications

References 10 publications

Effect of the particle size distribution on physical properties, composition, and quality of gas atomized Astroloy powders for HIP application

Effect of the particle size distribution on physical properties, composition, and quality of gas atomized Astroloy powders for HIP application

Creep Damage and Deformation Mechanism of a Directionally Solidified Alloy during Moderate-Temperature Creep

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

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