Role of vanadium additions on tensile and cryogenic-temperature charpy impact properties in hot-rolled high-Mn austenitic steels

Ren, Jia-kuan; Chen, Qiyuan; Chen, Jun

doi:10.1016/j.msea.2021.141063

Cited by 50 publications

(14 citation statements)

References 41 publications

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“…The recrystallized grains are considered as the "soft phase", while the unrecrystallized grains with high-density dislocations are considered as the "hard phase". This mixed structure in high-Mn steel provides an effective balance of strength and ductility [2,25,32,33]. Consequently, the hardness and tensile strengths of the simulated samples are proposed to be significantly affected by the recrystallization fraction.…”

Section: Effect Of Microstructure By Welding Thermal Cycles On Mechan...mentioning

confidence: 99%

The Dominant Role of Recrystallization and Grain Growth Behaviors in the Simulated Welding Heat-Affected Zone of High-Mn Steel

Wang,

Peng

et al. 2024

Materials

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Single-pass-welding thermal cycles with different peak temperatures (Tp) were reproduced by a Gleeble 3800 to simulate the heat-affected zone (HAZ) of a Fe-24Mn-4Cr-0.4C-0.3Cu (wt.%) high manganese austenitic steel. Then, the effect of Tp on the microstructure and mechanical properties of the HAZ were investigated. The results indicate that recrystallization and grain growth play dominant roles. Based on this, the HAZ is proposed to categorize into three zones: the recrystallization heat-affected zone (RHAZ) with a Tp of 700~900 °C, the transition heat-affected zone (THAZ) with a Tp of 900~1000 °C, and the coarse grain heat-affected zone (CGHAZ) with a Tp of 1000~1300 °C. The recrystallization fraction was 29~44% in the RHAZ, rapidly increased to 87% in the THAZ, and exceeded 95% in the CGHAZ. The average grain size was 17~19 μm in the RHAZ, slightly increased to 22 μm in the THAZ, and ultimately increased to 37 μm in the CGHAZ. The yield strength in the RHAZ and THAZ was consistent with the change in recrystallization fraction, while in the CGHAZ, it satisfied the Hall–Petch relationship with grain size. In addition, compared with the base material, the Charpy impact absorbed energy at −196 °C decreased by 22% in the RHAZ, but slightly increased in the CGHAZ. This indicates that the theory of fine grain strengthening and toughening is not entirely applicable to the HAZ of the investigated high-Mn steel.

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Section: Effect Of Microstructure By Welding Thermal Cycles On Mechan...mentioning

confidence: 99%

The Dominant Role of Recrystallization and Grain Growth Behaviors in the Simulated Welding Heat-Affected Zone of High-Mn Steel

Wang,

Peng

et al. 2024

Materials

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“…Cu Kα radiation was used for XRD testing, with a wave length of 0.154 nm, a dwell time of 1.2 s, and a scan step size of 0.02 . [21] The method proposed by Williamson and Smallman [22] was adapted to measuring dislocation density.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

“…Dislocation density ρ is determined by the crystallite size D and lattice strain ϵ, as follows. [21,22] ρðρ…”

Section: The Effect Of Controlled Rolling In the Austenite Recrystallization Temperature Region On Strength By Hot-rolling Experimentsmentioning

confidence: 99%

Controlled Rolling of X80 Pipeline Steel in the Austenite Recrystallization Temperature Region and Its Effect on the Microstructure and Mechanical properties

Zhou

Chen

et al. 2021

steel research int.

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In recent years, the improvement in the strength and toughness of X80 pipeline steel by only controlled rolling in the nonrecrystallization temperature region has been limited, it is difficult to meet higher application demands. Therefore, to further improve the effect of controlled rolling on the strength and toughness, the controlled rolling of X80 pipeline steel in the austenite recrystallization temperature region and its effect on the microstructure and mechanical properties after final rolling in the nonrecrystalization temperature region are investigated by thermal simulation experiments and hot‐rolling experiments. An increase in the last‐pass rough‐rolling deformation in the austenite recrystallization temperature region refines the austenite grain size after rough rolling and finish rolling, making the austenite grain size smaller and more uniform and improving the strength and low‐temperature impact toughness. The mechanism of austenite evolution based on the last‐pass deformation in the austenite recrystallization temperature region is revealed. The finer and more uniform austenite grain size accelerates the refinement of the granular bainite microstructure at room temperature. The main strengthening mechanisms are dislocation strengthening and grain refinement strengthening. The increase in toughness is due to the presence of a high percentage of high‐angle grain boundaries, which significantly impede crack propagation.

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“…Vanadium (V) is the recognized important material in strategic industries, and its utilization as a precursor has been primarily investigated in engineering steels (an alloying element in steels). − V forms highly stable oxides rather than carbon oxides [standard enthalpy of formation, Δ f H °/kJ mol –1 : CO (−110.5), CO 2 (−393.5), V 2 O 3 (−1219), V 2 O 5 (−1550)] . Furthermore, the V oxides can dissolve in various solutions and are easily recyclable.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

Saito,

Jinushi,

Soga

2024

ACS Omega

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Solid-state reaction (SSR) is a widely adopted method for functional inorganic material syntheses. Unlike intricate systems emerging from chemically unstable precursor usage, the SSR can proceed from stable precursor couples using simple apparatuses. However, this reaction is associated with high temperatures that overcome solid-state diffusion. Moreover, solidstate syntheses of technologically crucial carbides lead to greenhouse gas emissions. Therefore, exploring an extrinsic component to suppress these challenges is vital to confronting global energy and environmental issues. This study reports that the presence of an ordinary element, vanadium (V), changes the routes of the SSR of niobium carbide (NbC), producing NbC efficiently and cleanly. 1000 °C is far below the temperature required to obtain NbC from a precursor couple of Nb 2 O 5 and C, i.e., approximately 1500 °C is required. However, a carbon substitute, vanadium carbide, completely consumed Nb 2 O 5 before reaching 1000 °C and consummated NbC crystallization for 10 h. Furthermore, NbC crystallites were observed using X-ray diffraction from 770 °C, and their formation was primarily accompanied by VNbO 4 , rather than being routed through NbO 2 produced for the Nb 2 O 5 −C combination. The obtained NbC contained V as a dopant in the 15−50% range (NbC:V), and the relative abundance was correlated with the preparation temperature. Mass analyses revealed that the formation of NbC/V is barely associated with greenhouse gas emissions because of the sizable thermodynamic driving force for primarily forming vanadium oxide byproducts. Device performance using NbC/V was also assessed for a standard electrochemical hydrogen evolution reaction.

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Role of vanadium additions on tensile and cryogenic-temperature charpy impact properties in hot-rolled high-Mn austenitic steels

Cited by 50 publications

References 41 publications

The Dominant Role of Recrystallization and Grain Growth Behaviors in the Simulated Welding Heat-Affected Zone of High-Mn Steel

The Dominant Role of Recrystallization and Grain Growth Behaviors in the Simulated Welding Heat-Affected Zone of High-Mn Steel

Controlled Rolling of X80 Pipeline Steel in the Austenite Recrystallization Temperature Region and Its Effect on the Microstructure and Mechanical properties

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

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