The effect of titanium and reheating temperature on the microstructure and strength of plain-carbon, vanadium- and niobium-microalloyed steels

Wang, Shyi-Chin

doi:10.1007/bf00544206

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…titanium nitrides still stable, a relatively heterogeneous austenitic grain size distribution (local pinning forces) was verified. This is well characterized by the relatively high standard deviations 13 . Table 2 and Figure 15 present the effects of the prior austenitic grain size (PAGS) on the martensite start ( S M ) and finish ( f M ) temperatures.…”

Section: Critical Cooling Ratementioning

confidence: 98%

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Austenitizing Temperature and Cooling Rate Effects on the Martensitic Transformation in a Microalloyed-Steel

2020

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The effects of the austenitizing temperature and the cooling rate upon the kinetic of athermal martensitic transformation in a microalloyed steel were evaluated. Considering the studied steel, the knowledge about these effects on the martensitic transformation has a great relevance for naval manufacturers and steel researchers. In this study, computational simulation was performed aiming to evaluate the phase's stability. Specimens were submitted to quenching simulations in a dilatometer, considering four different austenitizing temperatures and four cooling rates. The results shown that the austenite chemical composition was not significantly affected by the austenitizing temperatures. Both the austenitic grain size and the cooling rate affected the martensitic transformation kinetics. The larger the austenitic grain size, the higher the Ms. The austenitic grain growth promoted a decrease in the required chemical energy to compensate the free energy increase associated with the lattice strain and the creation of new interfaces, leading to a lower austenite undercooling. An extrinsic effect of the cooling rate on the Ms was observed. For lower cooling rates, the carbide precipitation modified que austenite chemical composition, changing its stability and increasing Ms. A predictability equation, correlating the M S with the austenite grain size and the steel cooling rate, was proposed.

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Section: Critical Cooling Ratementioning

confidence: 98%

“…Nevertheless, second phase particles lead to the creation of local pinning forces which effectively restrict the grain boundary motion and consequently the grain growth 1,13 . As the studied austenitizing temperatures were not high enough to promote the complete dissolution of the precipitates, i.e.…”

Section: Critical Cooling Ratementioning

confidence: 99%

Austenitizing Temperature and Cooling Rate Effects on the Martensitic Transformation in a Microalloyed-Steel

2020

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“…However, up to now, few works on function of microalloy elements on deformation-induced pearlite transformation in high carbon steel has been carried out. As for DIFT, relative results showed that the ferrite grain could be further refined through combination of DIFT and vanadium microalloying [12,13]. Thus, the purposes of the present study are to investigate deformation-induced pearlite transformation in vanadium microalloyed steel and to examine the effect of vanadium.…”

Section: Introductionmentioning

confidence: 95%

Study on Deformation-Induced Pearlite Transformation in Vanadium Microalloyed Eutectoid Steel

Cai

Mao

Bao

et al. 2019

AMR

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In this paper, the hot compression tests were performed to study on deformation-induced pearlite transformation in vanadium microalloyed eutectoid steel. The results showed that volume fraction of deformation -induced pearlite were higher and the pearlite were spheroidized better under lower strain rate and higher strain in vanadium microalloyed steel. Ferrite grains and granular cementites were further refined through vanadium microalloying combined with deformation-induced pearlite transformation .Vanadium dissolved in γmatrix could retard deformation-induced pearlite transformation under low strain, vanadium carbides precipitated due to strain-induced precipitation eliminate the retardation when the strain was increased to a certain extent. Under heavy deformation, ferrite grains and granular cementites in vanadium microalloyed steel were finer compared with vanadium free steel.

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“…Vanadium microalloyed high strength low alloy (HSLA) steels are widely being used for construction, line pipe, pressure vessel, automobile, naval and defense applications [1,2]. VN or V(C,N) precipitates contribute to ferrite grain refinement either by retarding the recrystallization of hot-deformed austenite or by acting as the heterogeneous nucleation sites for intragranular ferrite formation [1,[3][4][5][6][7][8][9][10]. Although, the prime objective of V addition is to achieve precipitation strengthening from the fine VC or V(C,N) precipitates [1,[3][4][5][6]11].…”

Section: Introductionmentioning

confidence: 99%

Effect of composition and isothermal holding temperature on the precipitation hardening in Vanadium-microalloyed steels

Karmakar

Mukherjee

Kundu

et al. 2017

Materials Characterization

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The effect of titanium and reheating temperature on the microstructure and strength of plain-carbon, vanadium- and niobium-microalloyed steels

Cited by 8 publications

References 12 publications

Austenitizing Temperature and Cooling Rate Effects on the Martensitic Transformation in a Microalloyed-Steel

Austenitizing Temperature and Cooling Rate Effects on the Martensitic Transformation in a Microalloyed-Steel

Study on Deformation-Induced Pearlite Transformation in Vanadium Microalloyed Eutectoid Steel

Effect of composition and isothermal holding temperature on the precipitation hardening in Vanadium-microalloyed steels

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