The crack growth behavior of Incoloy 800H under fatigue and dwell-fatigue conditions at elevated temperature

Kim, D. J.; Seo, Dongyi; Tsang, J.; Yang, W. J.; Lee, J. H.; Saari, H.; Seok, Chang-Sung

doi:10.1007/s12206-012-0507-3

Cited by 12 publications

(2 citation statements)

References 7 publications

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“…The results revealed that the peak stress decreased whilst the aging time was increased. A further test regarding the relationship between fatigue crack growth (FCGR) and the external load ratios was conducted on Incoloy800H alloy at 750˝C [8]. As the load ratio increased, the crack growth increased as well.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

Continuous Casting of Incoloy800H Superalloy Billet under an Alternating Electromagnetic Field

Wang

Zhang

Deng

et al. 2015

Metals

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“…This extra carbon content controls the grain size, and it in turn optimizes the rupture properties. Due to its excellent property at high temperature, Incoloy 800 H finds application in heat-exchanging equipments, chemicalprocessing units, pressure vessels, hot ducts, fuel cladding, and super-heaters and re-heaters in power plants [2,3]. Heterogeneous metals are needed to be joined for various applications.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Artificial Neural Network and Response Surface Methodology for Optimization of Friction Welding of Incoloy 800 H

Anand

Shrivastava

Tamilmannan

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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This article deals with the optimization of process parameters for friction welding of Incoloy 800 H rod and compares the results obtained by response surface methodology (RSM) and artificial neural network (ANN). The experiments were carried out on the basis of a five-level, four-variable central composite design. The output parameters were the tensile strength and burn-off length (BOL). They were considered as a function of four independent input variables, namely heating pressure (HP), heating time, upsetting pressure (UP), and upsetting time. The RSM results showed that the quadratic polynomial model depicted the interconnection between individual element and response. For optimizing the process parameters, ANN analysis was used, and the optimal configuration of the ANN model was found to be 4-9-2. For modeling aspect, a requisite trained multilayer perceptron neural network was rooted, and a quick propagation training algorithm was used to train ANN. The purpose of optimization was to decide the maximum tensile strength and minimum burn-off length of the welded joint which was done by varying the friction welding process variables. The order of importance of input parameters for friction welding of Incoloy 800 H was HP [ UP [ N [ BOL. After predicting the model using RSM and ANN, a comparison was made for predicting the effectiveness of two methodologies. By analyzing the results, it was observed that as compared to RSM, ANN model was more specific.

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Mechanical properties of CO2/MIG welded structural rolled steel and stainless steel

et al. 2015

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The crack growth behavior of Incoloy 800H under fatigue and dwell-fatigue conditions at elevated temperature

Cited by 12 publications

References 7 publications

Continuous Casting of Incoloy800H Superalloy Billet under an Alternating Electromagnetic Field

Continuous Casting of Incoloy800H Superalloy Billet under an Alternating Electromagnetic Field

A Comparative Study of Artificial Neural Network and Response Surface Methodology for Optimization of Friction Welding of Incoloy 800 H

Mechanical properties of CO2/MIG welded structural rolled steel and stainless steel

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