Simulation of structure formation in the Fe–C–Cr–Ni–Si surfacing materials

Efremenko, B.V.; Belik, A.G.; Chabak, Yu. G.; Halfa, Hossam

doi:10.15587/1729-4061.2018.124129

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…The temperature of the kinetics maximum of ferrite and pearlite transformations increased to 688 and 620 • C, respectively, while the temperature of the kinetics maximum of "austenite → bainite" transformation decreased to 438 • C. Notably, steel B performed enhanced stability of overcooled austenite at each temperature in the sub-critical range: the minimum incubation period increased by 27 times, 6 times, and 4 times for ferrite/pearlite/bainite transformations, respectively. Herewith, additional alloying increased austenite stability for ferrite/pearlite transformations to a higher extent leading to a more pronounced allocation of the bainite domain [37,38]. One can conclude that steel B had a higher hardenability and a higher propensity for bainite formation as compared with steel A.…”

Section: Austenite Transformation Behavior and Microstructure Charact...mentioning

confidence: 89%

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Kussa¹,

Zurnadzhy²,

Dabalà³

et al. 2022

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The structure and mechanical properties of two 0.2 wt.% C TRIP-assisted steels (Transformation Induced Plasticity) were compared to evaluate the effect of additional (Cr, Mo, V)-alloying on transformation kinetic and tensile/impact behavior after isothermal bainite transformation (bainitizing) and Q&P (Quenching-and-Partitioning) treatment. The work was performed using SEM, XRD, tensile/impact testing, and computer simulation. It was found that adding 0.55 wt.% Cr, 0.2 wt.% Mo, and 0.11 wt.% V into Mn-Si-Nb steel increased the incubation time in pearlite and bainite temperature ranges by 5.6 and 4.4 times, respectively. More heavily alloyed steel performed an improved combination "Strength/Ductility/Impact Toughness": its maximum PSE (Product of Strength and Elongation) value of 24 GPa• % referred to bainitizing treatment, whereas the highest KCV 20 • C values (220-225 J cm −2 ) corresponded to Q&P treatment. Improved mechanical properties of (Cr, Mo, V)-alloyed steel were attributed to a higher amount of retained austenite and a slower rate of TRIP-effect.

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Section: Austenite Transformation Behavior and Microstructure Charact...mentioning

confidence: 89%

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Kussa¹,

Zurnadzhy²,

Dabalà³

et al. 2022

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“…In [14], the authors proposed a new "hybrid" approach, which consists in combining the multi-component alloying principle with adding an increased amount of boron and such a strong carbide-forming element as titanium [15]. This approach aims at the formation of complex carboboride phases with advanced tribological characteristics [16]. The implementation of new ideas should be based on computer modelling, which is now widely used at the preliminary stage of the alloy design [17,18].…”

Section: Introductionmentioning

confidence: 99%

Modeling of the phase-structural state in a hybrid multicomponent alloy with a high boron content

Chabak

Golinskyi

Ефременко

et al. 2022

Phys. Chem. Solid St.

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The present work is focused on analyzing the thermodynamically equilibrium path of structure formation in a multi-component Fe-W-Mo-Cr-Ti-Mn-Si alloy of tribotechnical purpose, containing 0.72 wt. % C and 2.75 wt. % B is analyzed. Computer simulation of the crystallization process was performed using the program “Thermo-Calc Software”. It was found that the alloy belongs to the hyper-eutectic compositions, since its crystallization begins at 1472 oC with the formation of primary boride WB and carbide TiC. After a series of subsequent eutectic reactions (in the range of 1126-923 oC) and solid-phase transformations, a set of equilibrium phases is formed in the alloy, which at room temperature consists of borides WB, MoV, Fe2B, Cr4B, Mn4B, carbides TiC, M7C3, and ferrite. The total volume fraction of borides and carbides is 45.05 vol. %. A comparison of the obtained data with the results of the study of the manufactured alloy showed that the simulation with “Thermo-Calc Software” provides satisfactory adequacy in predicting the structure in the alloys of the selected alloying system.

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“…The most minimum FeNiCr corrosion can be seen from the least diffusion coefficient of iron. Next, cast irons can be alloyed with strong carbide-forming elements such as Ti, V, Nb, and Mo to increase resistance [14].…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of corrosion and its inhibition: comparison of structural stability of Fe/FeNi/FeNiCr/FeNiCrTi steels under high-temperature liquid lead

Arkundato¹,

Syarifah²,

Shafi'i³

et al. 2022

Eureka: PE

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The liquid lead used in fast nuclear reactor has been known to be able to cause a significant damage to the steels. Therefore, finding new materials with high corrosion resistance is the goal of much research current days. Likewise, developing a way to prevent corrosion is also the goal of designers of nuclear reactors. In the present study, we studied materials: Fe, FeNi, FeNiCr, and FeNiCrTi (a type of SS 316L austenite steel), comparing their structural stability when interacted with molten liquid lead at 750 °C. The performance of each steel is compared under high-temperature molten lead coolant, checking the structure's stability to see the material resistance to corrosion attack of liquid lead. The corrosion can also be seen from the data of iron diffusion coefficient. The larger of the iron diffusion coefficient can be associated with larger corrosion because there is a high solubility of iron atoms from the steel surface to the molten lead. The popular way to prevent more corrosion is by injecting oxygen into the lead coolant. This current work uses the molecular dynamics method to simulate the corrosion and inhibition phenomena. The research aims to compare the performance of Fe, FeNi, FeNiCr, and FeNiCrTi under liquid lead at a temperature of 750. The diffusion coefficient of iron of material will be calculated to describe quantitatively the corrosion level of those structural materials and the corrosion inhibition by oxygen injection. The study has produced important results that adding Ni, Cr, Ti into a pure iron crystal to build alloy steel will make the material stronger, structurally compact, and more resistant to corrosion. For specific composition of steels, from weaker to stronger that resist from corrosion attack, it is possible to make ordering: Fe<<FeNi<FeNiCr<FeNiCrTi. The composition of FeNiCrTi steel in this work is Fe(75)Ni(10.57)Cr(14.05)Ti(0.40). The high corrosion of FeNiCrTi in the liquid lead is effectively reduced by injecting 0.0112 wt % oxygen into lead coolant as a limit value for maximum corrosion inhibition

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Simulation of structure formation in the Fe–C–Cr–Ni–Si surfacing materials

Cited by 7 publications

References 15 publications

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Modeling of the phase-structural state in a hybrid multicomponent alloy with a high boron content

Molecular dynamics simulation of corrosion and its inhibition: comparison of structural stability of Fe/FeNi/FeNiCr/FeNiCrTi steels under high-temperature liquid lead

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