Effect of Vanadium Addition on the Strength of API X100 Linepipe Steel

Nafisi, Shahrooz; Amirkhiz, Babak Shalchi; Fazeli, Fateh; Arafin, Muhammad; Glodowski, R. J.; Collins, Laurie

doi:10.2355/isijinternational.isijint-2015-290

Cited by 24 publications

(11 citation statements)

References 14 publications

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“…However, the carbides at the phase interfaces can decrease the plasticity and toughness of the steel . Therefore, it is generally used to increase an amount of deformation or reduce the precipitation temperature to control precipitates of vanadium carbide at phase interfaces …”

Section: Discussionmentioning

confidence: 99%

“…[16] Therefore, it is generally used to increase an amount of deformation or reduce the precipitation temperature to control precipitates of vanadium carbide at phase interfaces. [35] Additionally, the 3DAP observations of TAM steel indicate that C and V atoms distribute along dislocations and pin dislocations within retained austenite, which is marked with the rectangle (see Figure 6a and c). The V atoms are not always formed near the interphase, but distributed along the dislocations within retained austenite.…”

Section: Precipitation Behavior Using 3dapmentioning

confidence: 95%

“…The contribution of VC precipitates Microalloying with V gives rise to the formation of finer precipitates with higher density and volume fraction. [16,35] Table 2 shows that the precipitation strengthening of TAM steel increases with the increase of V-content, and the total strength of the experimental steels also increases.…”

Section: Effect Of V On Mechanical Properties Of Tam Steelmentioning

confidence: 97%

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Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

Song

et al. 2016

steel research int.

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(1 of 4) 1770053 Cover Photo: Electrochemical reactions always occur at the electrode-slag and slag-metal melt interfaces during the electroslag remelting (ESR) process. The cover shows a schematic representation of this process. A numerical model is developed to investigate those reactions together with the ion transport phenomenon. The cover fi gure is supplied by Christian Doppler Laboratory for Advanced Process An overview and discussion on a range of electromagnetic effects, including magnetic damping, magnetic levitation, pinch effect, as well as magnetic texture, and thermoelectric magnetic effect, etc., on themetallic materials morphology or fl ow behavior as well as on the corresponding particles. Recent development in improving the magnetic fl ux density has enable more signifi cant magnetic effects on weakly magnetic materials. The precipitation behavior and microstructural evolution of vanadiumadded TRIP-assisted annealed martensitic (TAM) steel are investigated using 3DAP. According to the 3DAP analysis, C, Mn and V atoms segregating at interface between retained austenite and BCC phases, and they can make the interface more stabilization by effectively pin the interface.

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Section: Discussionmentioning

confidence: 99%

Section: Precipitation Behavior Using 3dapmentioning

confidence: 95%

Section: Effect Of V On Mechanical Properties Of Tam Steelmentioning

confidence: 97%

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Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

Song

et al. 2016

steel research int.

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“…The precipitation strengthening effect was weakened by coarse precipitation and undissolved Nb/Ti carbonitrides according to the Ashby-Orowan model [27]. These precipitates should be insignificant not only after isothermal holding at 550 • C, 600 • C, 700 • C, and 800 • C, but also during the entire thermal simulation experiment.…”

Section: The Precipitation Behaviormentioning

confidence: 93%

“…These precipitates should be insignificant not only after isothermal holding at 550 • C, 600 • C, 700 • C, and 800 • C, but also during the entire thermal simulation experiment. The Ashby-Orowan model could be used to accurately calculate the strengthening contribution of 3-30 nm size precipitated phases [27]. Table 3 presents the volume fraction, the average size, and the strengthening contribution of precipitates.…”

Section: The Precipitation Behaviormentioning

confidence: 99%

The Impact of Isothermal Treatment on the Microstructural Evolution and the Precipitation Behavior in High Strength Linepipe Steel

Tian

Wang

et al. 2020

Materials

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Isothermal treatment affects the microstructural evolution and the precipitation behavior of high-strength low alloy (HSLA) steels. In this regard, thermal simulation of different isothermal treatment temperatures was adopted by using a thermomechanical simulator. The results showed that hardness reached the maximum value at 600 °C holding temperature, which was related to a finer grain structure and granular bainite. The strengthening effect of precipitates was remarkable due to the combination of small particle size and small interparticle spacing. It is presumed that the precipitation started after 600 s at 600 °C. Precipitation strengthening continued to exist, even though coarsening of ferrite grains led to softening phenomena when the specimen was isothermally held at 750 °C, which led to relatively high hardness. The precipitates were fcc (Ti, Nb) (N, C) particles, and belonged to MX-type precipitates. Average size of precipitates increased from 3.14 to 4.83 nm when the specimens were isothermally held between 600 °C and 800 °C. Interparticle spacing of precipitates also increased with increasing isothermal treatment temperatures. These led to a reduction in precipitation strengthening. At the same time the polygonal ferrite content increased and ferrite grain size got larger, such that the hardness decreased continuously.

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Thermodynamic and Kinetic Analyses of Inclusion Transformations in Linepipe Steel during Isothermal Heating at 1473 K (1200 °C)

Liu

Webler

2022

steel research int.

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Understanding the thermodynamics and kinetics of solid‐state reactions on the characteristic transformations of nonmetallic inclusions in the linepipe steel during isothermal heating is of great importance for achieving good steel quality. Herein, heat treatment experiments are used, which are carried out at 1473 K (1200 °C) between 1 and 10 h in an Ar atmosphere, to investigate the resulting changes in the inclusion characteristics of linepipe steel. The chemical compositions, morphology, and size distribution of the inclusions are characterized. Results indicate that Mn and S in the linepipe steel react with CaS inclusions/phases to form (Ca, Mn)S inclusions/phases during heating at 1473 K (1200 °C), while MnS inclusions are gradually decomposed. Based on the FactSage Macro process, a kinetic model is established to calculate the regional equilibrium at the interface between the inclusion and steel at every time step and predict the extent of the inclusion transformation during isothermal heating. The experimental measurements and predicted results are in reasonable agreement. The diffusion‐limited kinetic model verifies that the effects of heating time and inclusion size on inclusion transformation are as predicted for Mn and S diffusion control by observation.

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Effect of Vanadium Addition on the Strength of API X100 Linepipe Steel

Cited by 24 publications

References 14 publications

Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

The Impact of Isothermal Treatment on the Microstructural Evolution and the Precipitation Behavior in High Strength Linepipe Steel

Thermodynamic and Kinetic Analyses of Inclusion Transformations in Linepipe Steel during Isothermal Heating at 1473 K (1200 °C)

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