Dynamic precipitation and solute hardening in A V microalloyed steel and two Nb steels containing high levels of Mn

Akben, M.G.; Weiss, Isaac; Jonas, J. J.

doi:10.1016/0001-6160(81)90092-4

Cited by 175 publications

(92 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similarly, in the work of Akben et al, 7) it was shown that a Nb HSLA steel containing 1.90 mass% Mn had a slightly lower peak strain in dynamic recrystallization than a steel of similar composition, but containing only 1.25 mass% Mn. A reasonable explanation could be that, although Mn and Si do not make direct contributions to solute drag, they may exert indirect effects by influencing the diffusivity of Nb in austenite.…”

Section: A) Solute Drag Effectmentioning

confidence: 62%

“…Mn decreases the rate of Nb(C, N) precipitation, 7) in contrast to the effect of Si. This is because Si addition increases the apparent concentrations of C and N, and therefore the apparent solubility product of Nb(C, N).…”

Section: B) Pinning Effect Due To Strain-induced Precipitationmentioning

confidence: 92%

“…Some non-precipitating elements, such as Mn and Si, can alter the activities of C and N [5][6][7][8][9][10] ; that is to say, these elements can modify the effective solubility of Nb(C, N) and thereby influence the interaction between recrystallization and precipitation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Silicon on the Interaction between Recrystallization and Precipitationin Niobium Microalloyed Steels

2004

View full text Add to dashboard Cite

The effect of Si addition on the interaction between recrystallization and precipitation was investigated in terms of the no-recrystallization temperature (T nr ) on three microalloyed steels containing about 0.035 mass% Nb. The T nr was measured using torsion testing over the Si concentration range from 0.01 to 0.48 mass%. It was observed that the T nr increased with Si level, but appeared to saturate at long interpass times. In addition, high strains reduced the influence of Si on the T nr . This behaviour is attributed to the acceleration of Nb(C, N) precipitation by the addition of Si.

show abstract

Section: A) Solute Drag Effectmentioning

confidence: 62%

Section: B) Pinning Effect Due To Strain-induced Precipitationmentioning

confidence: 92%

See 1 more Smart Citation

Effect of Silicon on the Interaction between Recrystallization and Precipitationin Niobium Microalloyed Steels

2004

View full text Add to dashboard Cite

show abstract

“…In the first stage, the recrystallization fraction versus time curves are similar to those of non-microalloyed steels. In the second stage the curves display a plateau, caused by the formation of precipitates, which inhibit recrystallization, [4][5][6] as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 98%

The Kinetics of Static Recrystallization in Microalloyed Hypereutectoid Steels

2004

View full text Add to dashboard Cite

Compression tests were conducted in order to study the static recrystallization kinetics of hot deformed austenite in hypereutectoid steels containing 1 % carbon with different levels of vanadium and silicon. Tests were performed over a temperature range of 875 to 1 100°C using strain rates of 0.01, 0.1 and 1 s Ϫ1 . Graphs of the recrystallized fraction versus time were used to quantify the kinetics of the strain-induced precipitation and generate the precipitation temperature time diagrams for the three steels. A kinetic model for static recrystallization is proposed which takes the V and Si concentrations into account.KEY WORDS: hot rolling; static recrystallization; grain size; mathematical model; precipitation temperature time; vanadium; silicon.

show abstract

“…Adopted from [148] Solute drag effect provided by Nb in solution is limited and it can only suppress the recrystallisation to certain extents [81,89,93,104,125,139,148,149]. A much greater retarding force is the pinning force provided by the strain-induced fine Nb(CN)…”

Section: Effects Of Nb Solute or Precipitation On Austenite Recrystalmentioning

confidence: 99%

Thermomechanical Processing of Structural Steels with Dilute Niobium Additions

Cui

Patel²,

Palmiere

2016

HSLA Steels 2015, Microalloying 2015 &Amp; Offshore Engineering Steels 2015

View full text Add to dashboard Cite

-i - AbstractIn this thesis, the influence of various dilute Nb additions (0.005-0.02 wt%) on austenite microstructure evolution along thermomechanical processing, in terms of austenite recrystallisation and grain growth, were investigated using steels with three carbon content levels.At the homogenisation temperature of 1250°C, all dilute Nb additions were dissolved in low carbon steels whereas the Nb dissolution limits for 0.4 wt% and 0.6 wt% C steels were 0.012 wt% and 0.08 wt%, respectively. Dilute Nb additions did not show significant influence on homogenised austenite grain size. The dramatic increase in C contents was more influential, which decreased the homogenised austenite grain size.The influence of dilute Nb additions and C contents on dynamic recrystallisation behaviour was studied by rough rolling at high deformation temperature with low strain rate. The dilute Nb additions were found to increase the critical strain of dynamic recrystallisation whereas C contents showed no influence on the dynamic recrystallisation behaviour.The austenite recrystallisation behaviour after finish rolling and after the holding period between finishing passes were studied by means of interrupted plane strain compression (PSC) tests and double hit PSC tests. It was found that with low Nb supersaturation, recrystallisation happened prior to Nb precipitation. Solute Nb in austenite delayed the onset of austenite recrystallisation through solute drag effect.With high Nb supersaturation, Nb precipitation occurred before the onset of recrystallisation which completely retarded austenite recrystallisation.The austenite grain growth during the holding period between finish rolling passes was studied by the evolution of prior-austenite grain size before and after the 20s holding period at the highest finish rolling temperature (1050°C). There was no Nb precipitation found and the difference in austenite grain growth behaviour was Abstract -iiattributed to the solute drag effect from both Nb and C in solution. It was found that Nb in solution suppressed austenite grain growth. However, the effectiveness of solute Nb in suppressing austenite grain growth was affected by the C content. Acknowledgement

show abstract

Dynamic precipitation and solute hardening in A V microalloyed steel and two Nb steels containing high levels of Mn

Cited by 175 publications

References 8 publications

Effect of Silicon on the Interaction between Recrystallization and Precipitationin Niobium Microalloyed Steels

Effect of Silicon on the Interaction between Recrystallization and Precipitationin Niobium Microalloyed Steels

The Kinetics of Static Recrystallization in Microalloyed Hypereutectoid Steels

Thermomechanical Processing of Structural Steels with Dilute Niobium Additions

Contact Info

Product

Resources

About