The Orientation Distribution of Ferrite Grains Dynamically and Statically Transformed from Heavily Deformed Austenite

Kang, Joo‐Hee; Lee, Hu‐Chul

doi:10.2320/matertrans.45.2219

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…There is a good possibility that the orientation of the mother austenite near the grain boundary may deviate from that of the representative orientation of the grain, due to the pre-deformation. 32,33) Deformation after ferrite nucleation was also reported to effectively aggravate the ferrite orientation relationship with the mother austenite. 34) Figure 7 shows the results of the application of a small load (3 kNϭ26.5 MPa) during the ferrite transformation in a 0.15C-1.4Mn-0.3Si-0.02Ti-0.006B-0.03Al steel.…”

Section: Effect Of Applied Stress On the Ferrite Grain Formationmentioning

confidence: 99%

Ferrite Transformation during Deformation of Super-cooled Austenite

Lee

2008

ISIJ Int.

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The research results achieved by the Korean national project, HIPERS-21, on the ferrite transformation during the deformation of super-cooled low carbon austenite were summarized. Fine ferrite grains formed during the deformation of austenite, i.e. dynamically. The rate of ferrite nucleation was estimated to be accelerated several hundred times by the deformation of austenite. However, the grain refinement could not be explained by the accumulated strain alone. The application of stress during the ferrite transformation is known to effectively weaken the orientation relationship of the ferrite grains with austenite, making the coalescence of the grain difficult during the growth of ferrite and effectively increasing the nominal ferrite nucleation rate. The application of the dynamic ferrite transformation to industrial hot rolling or plate milling was also summarized. The multi-pass rolling technique was introduced to produce a fine ferrite grain structure and controlled cooling was adopted to produce a multi-phase structure in order to improve the work hardening rate of fine grained steels.

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Section: Effect Of Applied Stress On the Ferrite Grain Formationmentioning

confidence: 99%

Ferrite Transformation during Deformation of Super-cooled Austenite

Lee

2008

ISIJ Int.

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“…Hence particularly post-deformation is assumed to play an important roll in distributing the orientation of intergranular ferrite in 'dynamic' austenite-to-ferrite transformation. Lee and co-workers [25][26][27] have found that external stress during austenite-to-ferrite transformation has also the potential to distribute the orientation of intergranular ferrite. The combined effect of pre-/post-deformations and external stress on the orientation of intergranular ferrite may be a subject of the intense examination on dynamic transformation in a future.…”

Section: Role Of Pre-/post-deformations On the Orientationmentioning

confidence: 99%

Coherent-to-Incoherent Transition of Intergranular bcc-precipitates by Pre-/Post-deformations in a Ni-43Cr Alloy

Adachi

Tsuzaki

2005

ISIJ Int.

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Effects of light deformations before and after precipitation (pre-deformation and post-deformation) on orientation distribution of intergranular bcc-precipitates were examined in a Ni-43mass%Cr alloy by electron backscattered diffraction. It was found that the deviation angles from both the plane/direction parallel orientation relationships in the Kurdjumov-Sachs orientation relationship of intergranular precipitates were increased by both pre-and post-deformations, but post-deformation was more effective. Based on this result, microstructural evolution of intergranular precipitates formed dynamically was discussed with particular attention to coherent-to-incoherent transition of precipitates.

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Application of electron backscatter diffraction to the study of phase transformations

Gourgues-Lorenzon¹

2007

International Materials Reviews

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615 ref. biblioInternational audienceThe application of the electron backscatter diffraction technique to the investigation of phase transformations is reviewed. The wide variety of results obtained using this technique is illustrated and discussed, focusing on thermodynamics and kinetics of phase transformations, solidification, solid state phase transformations, environmentally assisted reactions and thin film deposition. Emphasis is also placed on two rapidly growing developments: coupling electron backscatter diffraction with advanced experimental techniques and with more and more complex modelling of phase transformations and of resulting material properties

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The Orientation Distribution of Ferrite Grains Dynamically and Statically Transformed from Heavily Deformed Austenite

Cited by 3 publications

References 8 publications

Ferrite Transformation during Deformation of Super-cooled Austenite

Ferrite Transformation during Deformation of Super-cooled Austenite

Coherent-to-Incoherent Transition of Intergranular bcc-precipitates by Pre-/Post-deformations in a Ni-43Cr Alloy

Application of electron backscatter diffraction to the study of phase transformations

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