Research on the hot deformation behavior of a Fe–Ni–Cr alloy (800H) at temperatures above 1000 °C

Cao, Yu; Di, Hongshuang

doi:10.1016/j.jnucmat.2015.05.014

Cited by 16 publications

(12 citation statements)

References 49 publications

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“…Recrystallized grains have lower GOS values than deformed grains as reported in several papers [31][32][33][34][35] . In this work, a threshold value of 2.5 o was chosen to distinguish recrystallized and non-recrystallized grains.…”

Section: Annealing Behaviorsupporting

confidence: 70%

Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing

et al. 2017

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A [211]-oriented niobium single crystal was deformed by equal channel angular pressing (ECAP) at room temperature using the route B c to a total strain of 9.2. A sharp cube texture develops after ECAP processing. The deformed samples were annealed in vacuum from 400ºC (673 K) to 900ºC (1173 K) for 1 h to evaluate their microstructural stability. Scanning electron microscopy (SEM) was used to image the microstructures of as-deformed and annealed specimens. Electron backscatter diffraction (EBSD) was employed to determine the respective microtextures before and after annealing. Coarsening of the microstructure occurs at a maximum rate at 550ºC (823 K) due to discontinuous recrystallization. Normal grain growth replaces discontinuous recrystallization as the main coarsening mechanism above 700ºC (973 K).

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Section: Annealing Behaviorsupporting

confidence: 70%

Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing

et al. 2017

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“…Metals 2016, 6,0001 develop into the unidirectional columnar dendrites towards the centre of the billet, as shown in Figure 4b. In this region, coarse columnar dendrites are found.…”

Section: Ems On the Macro-and Microstructurementioning

confidence: 99%

“…Metals 2016, 6,0001 For the specimens obtained in Set I and II, the variation of the secondary dendrite arm spacing (SDAS) is also investigated, as shown in Figure 5. It is clear shown that the SDAS is remarkably decreased when the EMS is applied.…”

Section: Ems On the Macro-and Microstructurementioning

confidence: 99%

“…Proper welding conditions were suggested, namely a temperature of 1423 K for an hour with an applied pressure of 5 MPa. Compression tests were conducted to investigate the hot deformation behavior of Incoloy800H superalloy at 1000˝C [6] and 750˝C [7], respectively. For temperatures above 1000˝C, a distinct change in slope of the linear fit curve regarding flow stress and temperature can be observed.…”

Section: Introductionmentioning

confidence: 99%

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Continuous Casting of Incoloy800H Superalloy Billet under an Alternating Electromagnetic Field

Wang

Zhang

Deng

et al. 2015

Metals

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Abstract:We experimentally investigate the influence of an alternating electromagnetic field on the surface and internal qualities of Incoloy800H superalloy billets. The electromagnetic continuous casting experiments for Incoloy800H superalloy were successfully conducted and the billets (0.1 mˆ0.1 mˆ1.2 m) were obtained. We figure out that the high frequency (20.4 kHz) electromagnetic field which is applied in the mould region can improve the surface quality of Incoloy800H superalloy billet remarkably; the depth of oscillation mark decreases from 1.2 mm (without electromagnetic field) to 0.3 mm (with electromagnetic field). The internal quality of the billet was studied using a variety of characterization techniques. The low frequency (5 Hz) electromagnetic field which is applied in the second cooling region can improve the internal quality; the region of the equiaxed grain increases from 2.45% (without electromagnetic field) to 41.45% (with electromagnetic field). Furthermore, macro-and micro-segregation are suppressed and the TiN inclusion number is decreased as well.

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“…3 They are widely used in high-temperature environments, such as steam generator tubes, nuclear power reaction tubes, gas turbines, petrochemical and refinery industries, reformer tubes, furnace components, and pyrolysis tubes. 4 The operating temperature of the modern power plant is up to 760 C, and the steam pressures are more than 35 MPa. High-temperature failure mechanism includes creep,…”

mentioning

confidence: 99%

Relationship between the microstructure and the heat treatment and creep behavior of Fe–33Ni–19Cr alloy

Mudang

Hamzah

Bakhsheshi‐Rad

et al. 2021

Fatigue Fract Eng Mat Struct

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In the present study, the relationship between heat treatment, grain size, and the creep rupture properties of Fe-33Ni-19Cr alloy was investigated. The microstructure analysis showed that Fe-33Ni-19Cr alloy consists of the austenite phase matrix and a small number of precipitates such as titanium nitride and titanium carbides. Fe-33Ni-19Cr alloy shows an increase in steady-state creep rate with increased grain size from 94 to 381 μm, due to the grain boundary sliding mechanism. The result also exhibited that the alloy that was subjected to creep test failed in ductile mode and cavitation at the grain boundaries. The fracture surface shows a transgranular fracture but an intergranular fracture at the recrystallized grains at the fracture area. Taken together, the result exhibited that the Fe-33Ni-19Cr alloy subjected lower heat treatment temperature possess a smaller grain size, which led to better creep property along with more excellent service life during operation.A superalloy is an alloy capable of withstanding high stresses and often highly oxidizing atmosphere and high temperatures, which often reach extreme temperatures surpassing 1200 C. 1 These harsh environments caused creep to be a serious issue when the alloys are used at high temperatures. Superalloys based on iron (Fe), nickel (Ni), and cobalt (Co) can be engineered to be highly resistant to creep. 2 Thus, superalloys have arisen as an ideal material to be used in high-temperature environments. Fe-Ni-Cr alloy is a solid solution strengthening ironnickel-based heat-resistant steel. 3 They are widely used in high-temperature environments, such as steam generator tubes, nuclear power reaction tubes, gas turbines, petrochemical and refinery industries, reformer tubes, furnace components, and pyrolysis tubes. 4 The operating temperature of the modern power plant is up to 760 C, and the steam pressures are more than 35 MPa. High-temperature failure mechanism includes creep,

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Research on the hot deformation behavior of a Fe–Ni–Cr alloy (800H) at temperatures above 1000 °C

Cited by 16 publications

References 49 publications

Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing

Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing

Continuous Casting of Incoloy800H Superalloy Billet under an Alternating Electromagnetic Field

Relationship between the microstructure and the heat treatment and creep behavior of Fe–33Ni–19Cr alloy

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