Ferrite Nucleation at Ceramic/Austenite Interfaces.

Zhang, Sanhong; Hattori, Nobuyuki; Enomoto, Masato; Tarui, Toshimi

doi:10.2355/isijinternational.36.1301

Cited by 113 publications

(71 citation statements)

References 2 publications

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“…Many other experimental results have demonstrated that V(C,N) precipitates at the austenite grain boundaries are associated with ferrite grains, which have the Baker-Nutting relationship with the V(C,N) precipitates. The nucleation of ferrite grains at the interface of the V(C,N) particles is favored in view of the interfacial energy, [11][12][13] and the V(C,N) particles act as a favorable nucleation site for ferrite nucleation during cooling. As a result, ferrite grains in the V containing steel deviate more from the K-S orientation relationship with austenite than the base steel.…”

Section: Effect Of V(cn) Precipitates On the Nucleation Of Ferritementioning

confidence: 99%

Orientation Distribution of Proeutectoid Ferrite Nucleated at Prior Austenite Grain Boundaries in Vanadium-added Steel.

Cho¹,

Suh²,

Kang³

et al. 2002

ISIJ International

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Section: Effect Of V(cn) Precipitates On the Nucleation Of Ferritementioning

confidence: 99%

Orientation Distribution of Proeutectoid Ferrite Nucleated at Prior Austenite Grain Boundaries in Vanadium-added Steel.

Cho¹,

Suh²,

Kang³

et al. 2002

ISIJ International

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“…55 (2015), No. 3 sidered to be stimulated by (a) the solute depletion in the vicinity of non-metallic inclusions, [16][17][18] (b) the reduced interfacial energy between austenite and ferrite, 19) (c) the thermal strain energy due to different thermal contraction, 19) and (d) the provision of an inert surface. 20) In the present work, the precipitation of MnS took place on the pre-formed ZrO2 because MnS and ZrO2 have two exactly the same and one very similar interplanar distances.…”

Section: The Nucleation and Growth Of Acicular Ferritementioning

confidence: 99%

“…9,10) Extensive work has been carried out on the nucleation of acicular ferrite. [11][12][13][14][15][16][17][18][19][20][21][22][23] Therefore, the present work focused on the growth behavior of acicular ferrite using in-situ observation in conjunction with thermodynamic calculations.…”

Section: Introductionmentioning

confidence: 99%

In-situ Observations of Acicular Ferrite Growth Behavior in the Simulated Coarse-grained Heat-affected Zone of High-strength Low-alloy Steels

Wan

Cheng

et al. 2015

ISIJ Int.

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The formation of acicular ferrite in the simulated heat-affected zone of high-strength low-alloy steels was investigated by means of in-situ observation. The acicular ferrite laths or plates were nucleated on intragranular Zr-Ti complex oxides in big austenite grains and then lengthened very fast. The growth of individual acicular ferrite lath or plate was completed in a very narrow temperature range, especially at low temperatures. The measured lengthening rates of ferrite laths or plates were ranged from 33.3 μm/s to 190.5 μm/s, which fell between limit calculated assuming para-equilibrium and negligible-partition local equilibrium modes from the semi-empirical equation proposed by Hillert.

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“…In the recent decades, considerable research has been conducted to evaluate different inclusion types regarding their capability for acicular ferrite: Ti-containing inclusions such as TiN and TiC, [16] titanium oxides [17][18][19][20] partly in combination with rare earth metals, [17] or Manganese [19] have been intensively studied. The effects of many inclusion types have already been well described in the literature, with some popular types, however, being left out, with conflicting results.…”

Section: Introductionmentioning

confidence: 99%

On the Capability of Nonmetallic Inclusions to Act as Nuclei for Acicular Ferrite in Different Steel Grades

Loder

Michelic

Mayerhofer

et al. 2017

Metall Mater Trans B

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Acicular ferrite nucleates intragranularly on nonmetallic inclusions, forming a microstructure with excellent fracture toughness. The formation of acicular ferrite is strongly affected by the size, content, and composition of nonmetallic inclusions, but also by the composition of the steel matrix. The potential of inclusions in medium carbon HSLA (high-strength low-alloyed) steels has been the main focus in the literature so far. The current study evaluates the acicular ferrite capability of various inclusions types in four different steel grades with carbon contents varying between 0.04 and 0.65 wt pct. The investigated steels are produced by melting experiments on a laboratory scale and subsequent heat treatment in a High-Temperature Laser Scanning Confocal Microscope. Inclusions are exclusively formed by deoxidation and desulfurization reactions. No synthetic particles are added to the melt. The inclusion landscape is analyzed by Scanning Electron Microscopy. Final ductility of the samples is evaluated based on performed tensile tests. Inclusion types in every steel grade are assessed regarding their nucleation potential always considering the interaction with the steel composition, especially focusing on the role of manganese. The effects of (Ti,Al)O x -, MnS-, and MgO-containing inclusions are discussed in detail.

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Ferrite Nucleation at Ceramic/Austenite Interfaces.

Cited by 113 publications

References 2 publications

Orientation Distribution of Proeutectoid Ferrite Nucleated at Prior Austenite Grain Boundaries in Vanadium-added Steel.

Orientation Distribution of Proeutectoid Ferrite Nucleated at Prior Austenite Grain Boundaries in Vanadium-added Steel.

In-situ Observations of Acicular Ferrite Growth Behavior in the Simulated Coarse-grained Heat-affected Zone of High-strength Low-alloy Steels

On the Capability of Nonmetallic Inclusions to Act as Nuclei for Acicular Ferrite in Different Steel Grades

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