Microstructure heterogeneity and creep damage of DZ125 nickel-based superalloy

Sun, Huilan; Tian, Na; Yu, Huan; Meng, Xianlin

doi:10.1016/j.pnsc.2014.05.004

Cited by 25 publications

(6 citation statements)

References 26 publications

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“…The thermal strain response of the EFPI under different temperatures was evaluated in Figure 9b,c. Figure 9b presents the thermal strain measured by the EFPI under different temperatures from 100-1000 • C. The maximum value of 16,215.33 µε was measured under 1000 • C. It is noted that the curve of thermal strain-temperature is obtained by polynomial fitting, this is because the CTE of DZ125 [36] is not a constant value. For comparison, a Finite Element Method (FEM) simulation is performed to calculate the thermal strain response of the DZ125 test part under different temperatures from 100-1000 • C. A threedimensional geometrical model of the DZ125 metal plate was built and imported to the static structural module in ANSYS.…”

Section: Results Of Strain Measurement and Calibration At Room Temperaturementioning

confidence: 98%

“…The maximum value of 16,215.33 με was measured under 1000 °C. It is noted that the curve of thermal strain-temperature is obtained by polynomial fitting, this is because the CTE of DZ125 [ 36 ] is not a constant value. For comparison, a Finite Element Method (FEM) simulation is performed to calculate the thermal strain response of the DZ125 test part under different temperatures from 100–1000 °C.…”

Section: Resultsmentioning

confidence: 99%

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A Composite Fabry-Perot Interferometric Sensor with the Dual-Cavity Structure for Simultaneous Measurement of High Temperature and Strain

Xia

Tan

Yang

et al. 2021

Sensors

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In this paper, an optical fiber composite Fabry-Perot interferometric (CFPI) sensor capable of simultaneous measurement of high temperature and strain is presented. The CFPI sensor consists of a silica-cavity intrinsic Fabry-Perot interferometer (IFPI) cascading an air-cavity extrinsic Fabry-Perot interferometer (EFPI). The IFPI is constructed at the end of the transmission single-mode fiber (SMF) by splicing a short piece of photonic crystal fiber (PCF) to SMF and then the IFPI is inserted into a quartz capillary with a reflective surface to form a single-ended sliding EFPI. In such a configuration, the IFPI is only sensitive to temperature and the EFPI is sensitive to strain, which allows the achieving of temperature-compensated strain measurement. The experimental results show that the proposed sensor has good high-temperature resistance up to 1000 °C. Strain measurement under high temperatures is demonstrated for high-temperature suitability and stable strain response. Featuring intrinsic safety, compact structure and small size, the proposed CFPI sensor may find important applications in the high-temperature harsh environment.

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Section: Results Of Strain Measurement and Calibration At Room Temperaturementioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

A Composite Fabry-Perot Interferometric Sensor with the Dual-Cavity Structure for Simultaneous Measurement of High Temperature and Strain

Xia

Tan

Yang

et al. 2021

Sensors

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show abstract

“…This is one of the novel contributions of this study. (2) The warpage deformation of the rabbet is significant during the wax injection stage, with the most severe area reaching 4.794 mm and the average volume shrinkage of the rabbet reaching 5.416%.…”

Section: Discussionmentioning

confidence: 98%

“…1 Nickel-based superalloys are widely used in manufacturing turbine blades, because of high temperature fatigue resistance, creep strength, and corrosion resistance. 2 Nickel-based single-crystal (SC) superalloy cast blades can be developed by applying material genetic engineering techniques. 3,4 Heavy-duty gas turbines with natural gas as an energy source have the advantages of high efficiency, low emissions, and high peaking capacity.…”

Section: Introductionmentioning

confidence: 99%

Modeling and experimental study on deformation prediction of thin-walled turbine blades during investment casting process

Zhou

Wang

Cui

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Due to variable cross-sections and a thin-walled structure, gas turbine blades have stringent dimensional, and geometrical tolerance requirements. Single-crystal hollow blades are manufactured using the following investment casting processes: ceramic core preparation, wax injection, ceramic coating, wax removal, metal casting, and finishing. The main causes of the final casting deformation are wax pattern deformation, core deflection, and metal solidification warpage. This paper proposes a numerical simulation method to predict the deformation of the wax pattern, core deflection, and the directional solidification (DS) process of large single-crystal blades. Additionally, it investigates the displacement field and the influence of casting process parameters on dimensional accuracy. Three groups of DS process parameters were selected for experiments, and the deformation prediction was in agreement with the experimental results. The selected blade section deformation is the smallest when the pouring temperature is 1530°C and the withdrawal rate is 5 mm/min. The proposed finite element model is efficient to predict the deformation in all the investment casting processes, providing geometric guidance for the control of the dimensional accuracy of the turbine blade.

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“…Although transverse grain boundaries have been eliminated in DS alloys, some longitudinal boundaries remain along the direction parallel to the stress axis [22]. In the process of service, the aerospace engines experience conditions ranging from medium temperature (700-900 • C)/high stress to high temperature (900-1100 • C)/low stress, and so aerospace engine blades must bear various conditions from starting to stabilization.…”

Section: Introductionmentioning

confidence: 99%

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

Tian

Fang

et al. 2021

Crystals

Self Cite

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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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Microstructure heterogeneity and creep damage of DZ125 nickel-based superalloy

Cited by 25 publications

References 26 publications

A Composite Fabry-Perot Interferometric Sensor with the Dual-Cavity Structure for Simultaneous Measurement of High Temperature and Strain

A Composite Fabry-Perot Interferometric Sensor with the Dual-Cavity Structure for Simultaneous Measurement of High Temperature and Strain

Modeling and experimental study on deformation prediction of thin-walled turbine blades during investment casting process

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

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