The Influence Of Adding Niobium And Vanadium On Hydrogen

Di: Amelia

Direct Atomic-Scale Imaging of Hydrogen and Oxygen Interstitials in Pure Niobium Using Atom-Probe Tomography and Aberration-Corrected Scanning Transmission Electron Microscopy. Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels. Nb and V were added into 22MnB5 hot stamping steel, and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5% NaCl as an effective method aqueous solution were investigated. The results showed that the addition of Nb/V The favorable effect of doping with carbonitride-forming elements-vanadium, niobium, and titanium — on the structure and properties of low-pearlite steels subjected to controlled rolling is due to the change of the structural state of hot-deformed austenite, of the temperature range and nature of the γ→α-transformation, of the phase composition of the steel, and of the state of the

Effect of microalloying elements on the pearlite formation temperature range is varying: vanadium contracts it, while niobium and titanium broaden it. What is important, niobium contributes to lowering the pearlite transformation finish temperature by 30-40° С. Deformation of austenite substantially affects the kinetics of austenite The metallic vanadium has an excellent hydrogen storage properties in comparison to other hydride forming metals such as titanium, uranium, and zirconium. The gravimetric storage capacity of vanadium is over 4 wt% which is even better than AB 2 and AB 5 alloys. The metallic vanadium has shown high hydrogen solubility and diffusivity at nominal temperature and ABSTRACT Compared with niobium and vanadium, titanium has been regarded as a relative minor element in microalloyed (MA) steels. More recently, titanium compounds in MA steels have been recognised as having a wider role than just involved in austenite grain refinement. A brief history is followed by considering the physical state of titanium and its

Development of a Niobium-Based Coordination Compound with Catalytic ...

Vanadium (V), niobium (Nb), and tantalum (Ta) are transition metals from group V. They have partly filled d shells, so they are defined as transition elements. Vanadium and niobium are widely distributed in earth’s crust, but there are few concentrated deposits of these elements. Tantalum is less abundant in the earth’s crust; it occurs in the same minerals as New hydrogen and deuterium permeability coefficients have been recently given at least for vanadium [6]. In the present work, experimental values for the deuterium/hydrogen permeability in niobium are provided and discussed. I.INTRODUCTION No systematic investigation ofhydrogen diffusion has been done invanadium-niobium THE alloys. One tudy 4 showed diffusion of hydrogen hasfrequently been studied little change inthe rate ofhydrogen migration when in pure, solute-free metals. The influence of substitutional 1 at. pct niobium wasadded topure vanadium. However, alloying elements

Hydrogen and deuterium diffusion in vanadium-niobium alloys

This study uses plane wave density functional theory (DFT) to investigate the effect of certain metal carbides (Niobium carbide, Vanadium carbide, Titanium carbide, and Manganese sulfide) it occurs in the on hydrogen embrittlement in pipeline steels. Our results predict that the interaction of hydrogen molecules with these metal carbides occurs in the long range with binding energy

Enhancing steel’s corrosion resistance is crucial, and one method involves adding niobium (Nb). Niobium microalloyed steels are known for their increased strength, and some research indicates that Nb may also improve Carbide-free bainitic (CFB) steels with a matrix of bainitic ferrite and thin layers of retained austenite, to reduce the manufacturing costs, usually do not contain alloying elements. However, a few reports were presented regarding the effect of alloying elements on the properties of these steels. Thus, this study evaluates the effects of vanadium and rare earth (Ce-La)

The larger atomic radius of vanadium causes lattice distortion when it is dissolved in the matrix, increasing the resistance to dislocation motion and resulting in solid solution strengthening. Therefore, the addition of vanadium enhances the hardness of the alloy. Therefore, the high-density grain boundary behavior in high improves the influence of hydrogen to prevent an excessively high concentration of hydrogen [24 – 26]. Carbides have the strongest hydrogen trapping ability, and Nagao pointed out that nanoscale (Ti, Mo) C in martensitic steel is more capable of trapping hydrogen than larger particles [27 – 31].

The evolution of precipitation and microstructure during a simulation of the thin slab direct rolling process, in six vanadium based, low carbon, steels with V, V-N, V-Ti-N, V-Nb, V-Nb-Ti and V-Zr The niobium concentrations up to 0.12 wt% has no influence on the precipitation temperature of nitrides in this steel (Figure 5A), whereas the formation temperature of niobium carbides is increased considerably up to 0.03 wt% Nb. Further addition of niobium gradually increases the precipitation temperature of carbonitrides.

Effect of Vanadium and Niobium on the Microstructure of Carbide ...

Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels. Nb and V were added into 22MnB5 hot stamping steel, ductility loss of and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5% NaCl aqueous solution were investigated. The results showed that the addition of Nb/V

Effect of alloying elements in Steel

Abstract Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels. Nb and V were added into 22MnB5 hot stamping steel, and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5% NaCl aqueous solution were investigated. Hydrogen storage Carbides have the has become the major bottlenecks limiting the application of hydrogen energy. TiFe-based alloys are an ideal choice for the developme Influence of vanadium and/or niobium additions on delayed fracture behavior in high strength spring steel was studied by hydrogen permeation method and slow strain rate technique (SSRT), and its mechanism was analyzed.

Influence of vanadium and/or niobium additions on delayed fracture behavior in high strength spring steel was studied by hydrogen permeation method and slow strain rate technique (SSRT), and its mechanism was analyzed. Vapor Pressure Studies of the Vanadium-Hydrogen System and Thermodynamics of Formation of Vanadium-Hydrogen Solid Solutions1 Per Kofstad and W. E. Wallace

Quantification of hydrogen embrittlement was performed by the analysis of rupture modes and elongation to failure. Rupture mode identification and tensile tests evidenced a maximal susceptibility to hydrogen embrittlement at 80°C whereas hydrogen effect

The influence of niobium and vanadium as alloying elements on titanium alloy passivity have been investigated in Hanks‘ Balanced Salt Solution (HBSS), at 37 degrees C and pH 6.9.Ti6Al4V and Ti6Al6Nb have been considered.

Higher hydrides of vanadium and niobium

Influence of vanadium and/or niobium additions on delayed fracture behavior in high strength spring steel was studied by hydrogen permeation method and slow strain rate technique (SSRT), and its mechanism was analyzed. The results show that apparent diffusion coefficient of analysis of hydrogen in microalloyed spring steels Nb-V-steel and Nb-steel is lower than that in non Download Citation | On Aug 1, 2025, Litu Huo and others published Precipitation morphology of niobium and its influence on the microstructure and mechanical properties of Fe−Mn−Al−C

Metallurgical, Lower melting phases, Different physical properties. In order to avoid difficulties and problems, it is necessary to know very well how this, or that alloying element affects the weldability of the metal. Knowledge of the influence of alloying elements on the weldability of various steels will contribute to a better understanding of welding processes. The PHS with a higher strength was more susceptible to hydrogen-induced brittle fracture. The present work reports that vanadium additions, which serve to trap the hydrogen, considerably reduce the negative impact of the hydrogen uptake in aluminized 1800 MPa and 2000 MPa PHSs.

The hydrogen activity or fugacity required for the reactions to be at equilibrium was determined to indicate the propensity for hydrogen evolution, absorption, and hydride nucleation. The influence of processing conditions and kinetics on the proximity of hydrogen surface coverage to these theoretical values is discussed. Nb alloys are defined INTRODUCTION No systematic investigation ofhydr… as niobium-based materials that exhibit excellent strength and creep performance at high temperatures, good thermal conductivity, and chemical resistance, making them suitable for applications such as fuel rod cladding in commercial high-temperature liquid metal reactors. They are noted for being easier to fabricate and work with compared to

Addition of only Nb without Ti has little influence in the hot ductility of B steel. Hot ductility loss of B–Nb steel is due to grain boundary precipitation of BN. Adding a small amount of Ti improve the hot ductility of B–Nb steel. In B–Nb–Ti steel, hot ductility improvement is related to presence of TiN particle. Presence of TiN particles makes the BN precipitates’ distribution Alloying here refers to the addition of other elements to achieve the desired mechanical (higher tensile, yield, toughness etc.), physical (Hardness, color etc.), and chemical properties (e.g. corrosion resistance). Effect of Alloying elements in Steel / Iron & Stainless Steel Each alloying element has its own influence on the mechanical/ chemical properties of steel. In In vanadium the strenght and ductility appeared to be influenced by the magnitude of the nitrogen-to-hydrogen ratio. In niobium and tantalum the resultant strengthening from combined nitrogen and hydrogen seemed to be a superposition of the strengthening resulting from the individual contributions of nitrogen and hydrogen regardless of the nitrogen-to-hydrogen ratio

RBFF

General