Predicting long-term creep-rupture property of Inconel 740 and 740H

Dang, Yingying; Zhao, Xinbao; Yuan, Yong; Ying, He; Lu, Jin Tao; Yang, Zhen

doi:10.1179/1878641315y.0000000010

Cited by 18 publications

(5 citation statements)

References 6 publications

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“…Li et al [6] investigated the creep properties of the K417 allow at different high-temperature conditions and developed a physical analysis model to describe the influence of microstructural factors. As an example of using the time-temperature parameter (TTP) method, Larson-Miller [7] developed a predictive model for creep life at low temperatures. Similarly, an isothermal method [8] was proposed to describe the relationship between the creep property and stress under the conditions of constant temperature and changing stress for inferring the creep life of an alloy indirectly.…”

Section: Introductionmentioning

confidence: 99%

Machine learning-based predictions and analyses of the creep rupture life of the Ni-based single crystal superalloy

Chen,

Zhao

2023

Preprint

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The evaluation of creep rupture life is complex due to its variable formation mechanism. In this paper, machine learning algorithms are applied to explore the creep rupture life span as a function of 27 physical properties to address this issue. By training several classical machine learning models and comparing their prediction performance, XGBoost is finally selected as the predictive model for creep rupture life. Moreover, we introduce an interpretable method, Shapley additive explanations (SHAP), to explain the creep rupture life predicted by the XGBoost model. The SHAP values are then calculated, and the feature importance of the creep rupture life yielded by the XGBoost model is discussed. Finally, the creep fracture life is optimized by using the chaotic sparrow optimization algorithm. We then show that our proposed method can accurately predict creep properties in a cheaper and faster way than other approaches in the experiments. The proposed method can be used for the inverse design of alloys.

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Section: Introductionmentioning

confidence: 99%

Machine learning-based predictions and analyses of the creep rupture life of the Ni-based single crystal superalloy

Chen,

Zhao

2023

Preprint

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“…Inconel 740H is mainly applied to ultra-supercritical boiler tubes and performs preferable corrosion resistance on the working fluid side and supercritical water environment above 700°C [18,19]. Dang et al [20] have predicted the 230 MPa creep-rupture strength of Inconel 740H at 700°C and 10 5 hours, indicating that Inconel 740H exhibits good resistance to long-term creep at high temperatures. Pint et al [21–24] have studied the oxidation behaviour of Inconel 740H alloy under different pressures.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of Ni-based alloy Inconel 740H in supercritical carbon dioxide at 650–700°C

Xiao

Zhang

et al. 2022

Corrosion Engineering, Science and Technology

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Corrosion tests of Ni-based alloy Inconel 740H were carried out in supercritical carbon dioxide (S-CO 2 ) at 650-700°C under 25 MPa. The corrosion kinetics were measured by weight change as a function of time, and the surface oxide layers were characterised and identified by a series of characterisation methods. It is found that Inconel 740H experienced general oxidation, localised exfoliation and internal oxidation. A dense Cr 2 O 3 oxide scale rapidly formed on the surface of Inconel 740H at 650-700°C, resulting in good general corrosion resistance. Nodular oxidation was triggered by Tirich and Nb-rich oxides. Internal oxidation selectively oxidised Al. The causes of oxide-induced exfoliation are discussed.

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“…A move to 'advanced ultra-supercritical' (AUSC) or 'hyper-supercritical' (HSC) conditions-steam temperatures above 650 °C and pressures up to 350 bar-places greater importance on the mechanical properties of heat exchanger tubes, which requires the use of expensive, high nickel stainless steels or even more costly nickel-based alloys for the higher temperature parts [11]. Several studies have looked at these alloy types in such conditions [6,[12][13][14][15][16][17][18][19]; however, the main focus has been on the mechanical behaviour and associated life prediction; they do not provide an understanding of the fireside corrosion performance of the materials.…”

Section: Introductionmentioning

confidence: 99%

Fireside Corrosion of Heat Exchanger Materials for Advanced Solid Fuel Fired Power Plants

et al. 2021

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To address the challenge of climate change, future energy systems need to have reduced greenhouse gas emissions and increased efficiencies. For solid fuel fired combustion plants, one route towards achieving this is to increase the system’s steam temperatures and pressures. Another route is to co-fire renewable fuels (such as biomass) with coals. Fireside corrosion performance of two candidate superheater/reheater alloys has been characterised at higher heat exchanger surface temperature. Samples of the alloys (a stainless steel, Sanicro 25 and a nickel-based alloy, IN740) were exposed in fireside corrosion tests at 650 °C, 700 °C and 750 °C, in controlled atmosphere furnaces using the ‘deposit recoat’ test method to simulate superheater/reheater exposure for 1000 h. After exposure, the samples were analysed using dimensional metrology to determine the extent and distributions of corrosion damage in terms of surface recession and internal damage. At 650 °C, the stainless steel and nickel-based alloy performed similarly, while at 700 °C and above, the median damage to the steel was at least 3 times greater than for the nickel-based alloy. Optical and electronic microscopy studies were used to study samples’ damage morphologies after exposure. Intergranular damage and pits were found in sample cross sections, while chromium depletion was found in areas with internal damage. For high-temperature applications, the higher cost of the nickel-based alloy could be offset by the longer life they would allow in plant with higher operating temperatures.

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Predicting long-term creep-rupture property of Inconel 740 and 740H

Cited by 18 publications

References 6 publications

Machine learning-based predictions and analyses of the creep rupture life of the Ni-based single crystal superalloy

Machine learning-based predictions and analyses of the creep rupture life of the Ni-based single crystal superalloy

Corrosion behaviour of Ni-based alloy Inconel 740H in supercritical carbon dioxide at 650–700°C

Fireside Corrosion of Heat Exchanger Materials for Advanced Solid Fuel Fired Power Plants

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