Investigation of the fatigue damage mechanism of Inconel 617 at elevated temperatures obtained by in situ SEM fatigue tests

Wang, Qiang; Wang, Xi-Shu; Zhang, Naiqiang

doi:10.1016/j.ijfatigue.2021.106518

Cited by 24 publications

(4 citation statements)

References 38 publications

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“…Thus, coal-fired power plants are transitioning towards cleaner and more efficient processes to support the objective of maintaining the global average temperature rise well below 2 °C above pre-industrial levels. The advanced ultra-supercritical (A-USC) technology aims to elevate the main steam temperature to at least 650 °C, 1,2 representing a novel approach to coal-fired power generation. If the A-USC unit can be built, its efficiency will exceed 50%, 3 while carbon dioxide and pollutant emissions will be significantly reduced.…”

Section: Introductionmentioning

confidence: 99%

“…In-situ scanning electron microscopy (SEM) analyses of fatigue damage in Inconel 617 have revealed multiple crack initiation and propagation behaviours at elevated temperatures. 1 Cabet et al 23 and Totemeier et al 24 researched the creep-fatigue behaviour of Inconel 617 and found an accelerated failure phenomena. The oxidation behaviour of Inconel 617 in supercritical water (SCW) was studied, 25 and the results showed that the oxidation kinetics at 700 °C were between parabolic and linear laws, with Cr 2 O 3 being the primary oxide that forms.…”

Section: Introductionmentioning

confidence: 99%

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Effect of medium and pressure on stress corrosion cracking susceptibility of a nickel-based alloy

Chen,

Zhu,

Liu

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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Nickel-based alloy Inconel 617 is a candidate material for advanced ultra-supercritical units. Stress corrosion cracking (SCC) susceptibility of Inconel 617 under low-pressure superheated steam (0.1 MPa), high-pressure superheated steam (8 MPa) and supercritical water (25 MPa) at 650 °C was studied through slow strain rate tensile tests at strain rate of 5 × 10−7 s−1. The results indicate that Inconel 617 is susceptible to SCC in both superheated steam and supercritical water, with susceptibility increasing with pressure. In a nitrogen atmosphere, fractures were predominantly transgranular ductile. The fracture surface featured dimples and micropores. In three corrosive environments, both intergranular and transgranular fractures were observed. The rock sugar-like morphology becomes more and more obvious as the pressure increases. A large number of cracks perpendicular to the loading axis were found on gauge surface. The SCC mechanism for Inconel 617 in superheated steam and supercritical water conditions is internal oxidation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of medium and pressure on stress corrosion cracking susceptibility of a nickel-based alloy

Chen,

Zhu,

Liu

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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“…Adopting more eco‐friendly and efficient practices in coal‐based power generation is crucial for limiting the global temperature increase to within two degrees Celsius during this century. One of the promising development directions is to explore advanced ultra‐supercritical (A‐USC) technology, [ 1 ] which sets the initial steam temperature at no less than 650°C. [ 2 ] The efficiency of A‐USC units is projected to surpass 50%, [ 3 ] leading to a substantial decrease in both carbon and other pollutant emissions.…”

Section: Introductionmentioning

confidence: 99%

Stress corrosion cracking susceptibility of a new nickel‐based alloy in different environments

Chen,

Zhu,

Khan

et al. 2024

Materials & Corrosion

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Stress corrosion cracking (SCC) susceptibility of a new nickel‐based alloy C‐HRA‐2 under two types of superheated steam (SHS) (0.1 and 8 MPa) and supercritical water (SCW) (25 MPa) at 650°C was studied through slow strain rate tensile tests at a strain rate of 5 × 10−7 s−1. The results indicate that C‐HRA‐2 exhibits SCC susceptibility in both SHS and SCW, and the susceptibility increases with increasing pressure. Transgranular fracture (located inside) characterized by dimples/micropores and intergranular fracture (located at the edge) characterized by rock‐sugar‐like morphology was observed in all specimens. The brittleness of the alloy increases with the increase of medium pressure. A large number of cracks perpendicular to the loading axis were noticed on the gauge surface. The SCC mechanism of C‐HRA‐2 under steam and SCW is dynamic embrittlement.

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“…These observations were also corroborated by other researchers. 15,16 Numerous studies have tried to explore the association of low cycle fatigue loading [17][18][19][20][21][22][23][24] with the microstructural attributes of this alloy in past. However, only a few investigators have attempted to study the behavior under pure HCF loading.…”

mentioning

confidence: 99%

Microstructural damage assessment in alloy 617M near high cycle fatigue threshold at elevated temperature

Kale,

Thawre,

Peshwe

et al. 2024

Fatigue Fract Eng Mat Struct

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High cycle fatigue (HCF) behavior of Ni superalloy 617M is investigated at 973 K and R‐ratio −1 on a resonance‐based fatigue testing system at 85 Hz frequency. The alloy experiences an abrupt drop in fatigue life within a narrow domain of 2.5–5 MPa near its fatigue strength at 320 MPa. Electron microscopy and diffraction techniques were employed to thoroughly analyze the nominal fatigue damage. The characterization revealed the significance of precipitation of secondary phases M23C6, Ti (C, N), and γ′ phase in dictating the HCF strength of the alloy. Cyclic loading at high temperature causes γ‐matrix hardening and secondary phase precipitation synergistically strengthening the material beyond its yield strength. Conjunctively, dynamic strain aging was also seen to play a major role in the evolution of fatigue damage. The work highlights the collective contribution of γ′‐phase precipitation, carbides, and dynamic strain aging and their influence on the HCF behavior of alloy 617M.

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Investigation of the fatigue damage mechanism of Inconel 617 at elevated temperatures obtained by in situ SEM fatigue tests

Cited by 24 publications

References 38 publications

Effect of medium and pressure on stress corrosion cracking susceptibility of a nickel-based alloy

Effect of medium and pressure on stress corrosion cracking susceptibility of a nickel-based alloy

Stress corrosion cracking susceptibility of a new nickel‐based alloy in different environments

Microstructural damage assessment in alloy 617M near high cycle fatigue threshold at elevated temperature

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