Vanadium nitride in low-alloy low-carbon steels

Matrosov, Yu. I.; Anashenko, V. N.

doi:10.1007/bf00713836

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Kluken et al reported that the sequence of inclusion formation in Al-Ti-Si-Mn deoxidized steel weld metals can be outlined as follows [19]. VN could be placed between Al and Ti; thus, Table 7, the melting temperatures of selected oxidizes and nitrides [7,20]. The depletion of acicular ferrite promoting elements, Ti, Al, and V in the WB100 weld with the 70℃ preheating temperature can be explained that those in welds with a preheating temperature of 70℃ could nucleate it because of the relatively large austenite grain size and the longer retention time as Dallam et al reported [10]; while, the acicular ferrite promoting elements in welds with a preheating temperature of 15℃ and 35℃ could not nucleate the acicular ferrite phase because of a relatively small austenite grain size.…”

Section: The Chemical Composition and Austenite Grain Sizementioning

confidence: 98%

Effect of microstructure and chemical composition on cold crack susceptibility of high-strength weld metal

Lee

Kim

et al. 2011

J Mech Sci Technol

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The effects of the microstructural constituents, chemical composition, and retained austenite on high-strength weld metal were studied using preheat-free steels and GMAW solid wires with a low hydrogen content. The cold cracking susceptibility of these GMAW wires was evaluated using the y-groove Tekken test. The results showed that acicular ferrite produced the greatest resistance to cold cracking and that the microstructure of the deposit was more important than the hardness and diffusible hydrogen content in low-hydrogen weld metal. Crack blunting and branching occurred when a crack propagated through fine acicular ferrite because of the fine interlocking nature of the microstructure. Alloying elements for nucleating acicular ferrite, such as Ti, Al, and V, are required for proper austenite grain size, and sequence of inclusion formation was identified in the present paper. Furthermore, the retained austenite was not found to play the role of a hydrogen trapping site and so had no effect on the cold cracking susceptibility at a low preheating temperature (≤100℃) and low heat input (≤1.5 KJ/mm) to the weld metal.

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Section: The Chemical Composition and Austenite Grain Sizementioning

confidence: 98%

Effect of microstructure and chemical composition on cold crack susceptibility of high-strength weld metal

Lee

Kim

et al. 2011

J Mech Sci Technol

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“…Among the materials we considered, BN, TiB 2 , ScB 2 , AlN, VN, CaB 6 , and V 2 N can all be characterized as refractory materials because they have melting temperatures Z 2000 1C. [49][50][51][52][53][54][55] Thirty-nine of the reactions listed in Table 2 involve one or more of these species. Ten of the 39 reactions were already predicted by Alapati, Johnson, and Sholl: 24 2LiH + LiNH 2 + BN, 2LiBH 4 + ScH 2 , 2LiBH 4 + TiH 2 , 2LiBH 4 + Mg(NH 2 ) 2 , ScH 2 + Mg(BH 4 ) 2 , 3LiBH 4 + TiN, 12LiH + 3Mg(NH 2 ) 2 + 4BN, 2ScN + 3Mg(BH 4 ) 2 , 2TiN + 3Mg(BH 4 ) 2 and, 4LiH + 3LiNH 2 + VN.…”

Section: Single-step Reactionsmentioning

confidence: 99%

“…Among the materials we considered, BN, TiB 2 , ScB 2 , AlN, VN, CaB 6 , and V 2 N can all be characterized as refractory materials because they have melting temperatures Z 2000 1C. [49][50][51][52][53][54][55] Thirty-nine of the reactions listed in Table 2 involve one or more of these species. Ten of the 39 reactions were already predicted by Alapati 23,25,56 A few experimental reports support the idea that refractory materials make reactions involving them irreversible.…”

Section: Single-step Reactionsmentioning

confidence: 99%

Large-scale screening of metal hydrides for hydrogen storage from first-principles calculations based on equilibrium reaction thermodynamics

Kim

Kulkarni

Johnson

et al. 2011

Phys. Chem. Chem. Phys.

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Systematic thermodynamics calculations based on density functional theory-calculated energies for crystalline solids have been a useful complement to experimental studies of hydrogen storage in metal hydrides. We report the most comprehensive set of thermodynamics calculations for mixtures of light metal hydrides to date by performing grand canonical linear programming screening on a database of 359 compounds, including 147 compounds not previously examined by us. This database is used to categorize the reaction thermodynamics of all mixtures containing any four non-H elements among Al, B, C, Ca, K, Li, Mg, N, Na, Sc, Si, Ti, and V. Reactions are categorized according to the amount of H(2) that is released and the reaction's enthalpy. This approach identifies 74 distinct single step reactions having that a storage capacity >6 wt.% and zero temperature heats of reaction 15 ≤ΔU(0)≤ 75 kJ mol(-1) H(2). Many of these reactions, however, are likely to be problematic experimentally because of the role of refractory compounds, B(12)H(12)-containing compounds, or carbon. The single most promising reaction identified in this way involves LiNH(2)/LiH/KBH(4), storing 7.48 wt.% H(2) and having ΔU(0) = 43.6 kJ mol(-1) H(2). We also examined the complete range of reaction mixtures to identify multi-step reactions with useful properties; this yielded 23 multi-step reactions of potential interest.

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Structure and properties of low-alloy steels after controlled rolling

Matrosov¹

1975

Met Sci Heat Treat

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Vanadium nitride in low-alloy low-carbon steels

Cited by 5 publications

References 2 publications

Effect of microstructure and chemical composition on cold crack susceptibility of high-strength weld metal

Effect of microstructure and chemical composition on cold crack susceptibility of high-strength weld metal

Large-scale screening of metal hydrides for hydrogen storage from first-principles calculations based on equilibrium reaction thermodynamics

Structure and properties of low-alloy steels after controlled rolling

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