Influence of the iron content on the microstructure and electrochemical behavior of as-cast modified Inconel 625

Lourenço, J.C.; Souza, Luiz Paulo Pimentel de; Faria, M. I. S. T.; Nunes, Carlos Ângelo; Tomachuk, Célia Regina; Baker, Mark

doi:10.1016/j.corsci.2021.109892

Cited by 25 publications

(5 citation statements)

References 34 publications

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“…Inconel 625 is a nickel-based superalloy that is widely used in aerospace, petroleum, chemical, and marine industries [1][2][3]. However, machining Inconel 625 parts into fine shapes by conventional subtractive manufacturing methods is extremely difficult and expensive, attributed to the high hardness and high-temperature strength of this alloy.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Tensile Properties in Inconel 625 Superalloy Fabricated by Wire Arc Additive Manufacturing Using Improved Artificial Neural Network

Xu,

Lu,

Chen

et al. 2024

Applied Sciences

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This study exhibits the possibility of using an artificial neural network (ANN) to model the mechanical behavior of wire arc additive manufacturing (WAAM) for Inconel 625. For this reason, tensile tests of Inconel 625 superalloy as-built (AB) samples and samples after heat treatment at 1200 °C (HT-1200) by WAAM were performed. For the HT-1200 samples, the yield stress decreased, and the elongation increased significantly due to grain refinement and the formation of annealed twins. A new hybrid model combining a swarm intelligence optimization algorithm with a back propagation neural network (BPNN) was developed to simulate the flow behavior of the superalloy. Compared with other hybrid BPNN models that have been reported, the proposed BPNN model is in better agreement with the experimental data and provides a better description of the flow stress of the Inconel 625 superalloy. The excellent predictive ability of the model may be attributed to the optimization of the weights and thresholds of the BPNN, which obtains the optimal global solution in the search space more efficiently.

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Section: Introductionmentioning

confidence: 99%

Prediction of Tensile Properties in Inconel 625 Superalloy Fabricated by Wire Arc Additive Manufacturing Using Improved Artificial Neural Network

Xu,

Lu,

Chen

et al. 2024

Applied Sciences

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“…Iron content not only altered the microstructure but also had a pronounced impact on corrosion behavior. Lourenço et al [25] conducted a specific investigation into the effect of Fe content on the microstructure and electrochemical behavior of Inconel 625 prepared by arc melting. They found that the corrosion resistance of Inconel 625 improved significantly when adding 10 and 15 wt% Fe, in contrast to adding Fe in the 2-5 wt% range, due to the absence of the metal monocarbides (MC) phase.…”

Section: Introductionmentioning

confidence: 99%

Effect of Iron Content on the Pitting Corrosion Behavior of Laser-Cladded Ni-Cr-Mo Alloy Coating in a Simulated Seawater Environment

Liu,

Shen

et al. 2024

Coatings

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In order to study the effect of iron content on the pitting corrosion behavior of a Ni-Cr-Mo alloy coating in a simulated seawater environment, a Ni-Cr-Mo-xFe (x = 0, 5, 10, 15, 20, 25) alloy coating was prepared through laser cladding technology. These coatings primarily consist of a γ-Ni solid solution phase, with observable iron segregation in the interdendritic regions when the iron content reaches 25 wt%. After 42 days of salt spray corrosion, it was found that pitting began to appear on the surface when the iron content in the coating increased to 10 wt%. The results of electrochemical behavior revealed that the coatings with iron contents in a range of 10–25 wt% exhibited metastable pitting characteristics, and the impedance modulus decreased with the increase in iron content. Pitting corrosion occurs due to selective corrosion of the dendritic regions. When the iron content exceeds 10 wt%, the accumulation of iron in the outer layer of the passivation film would lead to an excess of cationic vacancies, and the stability of the passive film is then reduced. This study provides a reference for the control of the iron content in a Ni-Cr-Mo alloy coating when applied in marine environments.

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“…Ni-based superalloys are considered one of the most crucial high-temperature materials, performing well in terms of tensile strength even at elevated temperatures. In this regard, IN-625 superalloy, a Ni-Cr-Mo-Nb alloy, has been widely utilized in oil and gas and petrochemical industry applications [4,6].…”

Section: Introductionmentioning

confidence: 99%

Dissimilar transient liquid phase bonding of Ti-6Al-4V alloy to Inconel 625 superalloy: effect of bonding temperature on microstructural evolutions and mechanical properties

Zorriatolhosseini,

Mirsalehi,

Shamsi

2024

Weld World

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Influence of the iron content on the microstructure and electrochemical behavior of as-cast modified Inconel 625

Cited by 25 publications

References 34 publications

Prediction of Tensile Properties in Inconel 625 Superalloy Fabricated by Wire Arc Additive Manufacturing Using Improved Artificial Neural Network

Prediction of Tensile Properties in Inconel 625 Superalloy Fabricated by Wire Arc Additive Manufacturing Using Improved Artificial Neural Network

Effect of Iron Content on the Pitting Corrosion Behavior of Laser-Cladded Ni-Cr-Mo Alloy Coating in a Simulated Seawater Environment

Dissimilar transient liquid phase bonding of Ti-6Al-4V alloy to Inconel 625 superalloy: effect of bonding temperature on microstructural evolutions and mechanical properties

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