Texture in hot rolled austenite and resulting transformation products

Hutchinson, Bevis; Ryde, Lena; Lindh, Eva; Tagashira, Kohsuke

doi:10.1016/s0921-5093(98)00820-x

Cited by 75 publications

(47 citation statements)

References 3 publications

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“…Similar textures, observed for samples undergoing different recrystallisation rates, are somewhat unexpected in view of the well-known [18,[50][51] recrystallised and "pancake" texture components in steels. However, a recent study [21] on stainless steel and Ni-30 wt.% Fe model alloys reported no significant change in the  texture character with increasing deformation temperature.…”

Section: Effect Of Frt On the  Conditioningsupporting

confidence: 69%

“…The latter authors [21] explain this observation by a GB migration of the deformed grains during recrystallisation and a deformation of recrystallised grains during their growth. Furthermore, the substantial amount of solute elements, such as manganese, and the short interpass time between rolling steps retard and limit the static recrystallisation process in the present case [50][51].…”

Section: Effect Of Frt On the  Conditioningmentioning

confidence: 92%

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Crystallographic Reconstruction Study of the Effects of Finish Rolling Temperature on the Variant Selection During Bainite Transformation in C-Mn High-Strength Steels

Bernier

Bracke

Malet

et al. 2014

Metall Mater Trans A

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The effect of finish rolling temperature (FRT) on the austenite-(  ) to-bainite ( ) phase transformation is quantitatively investigated in high-strength C-Mn steels. In particular, the present study aims to clarify the respective contributions of the  conditioning during the hot rolling and the variant selection (VS) during the phase transformation to the inherited texture.To this end, an alternative crystallographic  reconstruction procedure, which can be directly applied to experimental electron backscatter diffraction (EBSD) mappings, is developed by combining the best features of the existing models: the orientation relationship (OR) refinement, the local pixel-by-pixel analysis and the nuclei identification and spreading strategy. The applicability of this method is demonstrated on both quenching and partitioning (Q&P) and as-quenched lath-martensite steels. The results obtained on the C-Mn steels confirm that the sample finish rolled at the lowest temperature (829°C) exhibits the sharpest transformation texture. It is shown that this sharp texture is exclusively due to a strong VS from parent brass {110}<1-12>, S {213}<-3-64> and Goss {110}<001> grains, whereas the VS from the copper {112}<-1-11> grains is insensitive to the FRT. In addition, a statistical VS analysis proves that the habit planes of the selected variants do not systematically correspond to the predicted active  slip planes using the Taylor model. In contrast, a correlation between the Bain group to which the selected variants belong and the FRT is clearly revealed, regardless of the parent orientation. These results are discussed in terms of polygranular accommodation mechanisms, especially in view of the observed development in the hot-rolled samples of high-angle grain boundaries with misorientation axes between <111>  and <110>  .

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Section: Effect Of Frt On the  Conditioningsupporting

confidence: 69%

Section: Effect Of Frt On the  Conditioningmentioning

confidence: 92%

Crystallographic Reconstruction Study of the Effects of Finish Rolling Temperature on the Variant Selection During Bainite Transformation in C-Mn High-Strength Steels

Bernier

Bracke

Malet

et al. 2014

Metall Mater Trans A

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“…Hutchinson et al 10) do not consider a phenomenological theory of variant selection in order to explain the prevalence of certain symmetric equivalents in a ferrite/bainite product texture, which originates from a partially recrystallized austenite matrix. According to them the specific features of the transformation texture can be explained in terms of the successive sequence of nucleation and growth of the BCC phase in the austenite parent phase, which displays either typical FCC deformation or recrystallization components.…”

Section: Introductionmentioning

confidence: 99%

“…In all of the previous reports [1][2][3][4][5][6][7][8][9][10][11][12] the variant selection is studied by means of XRD texture measurement. Therefore, the fundamental issue whether or not variant selection occurs in an individual austenite grain is still open.…”

Section: Introductionmentioning

confidence: 99%

Orientation Selective Martensite Transformation in an Fe-28Ni Alloy

Kestens¹,

Petrov²,

Houbaert³

2003

ISIJ International

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A variant selection phenomenon was studied during the phase transformation in an Fe-28%Ni alloy, which was slowly cooled to room temperature at a rate of 1°C/min after reheating to 1 000°C, or warm rolled at ϳ250°C during air cooling. The textures of parent and product phases were determined on the basis of local orientation measurements in the austenite and martensite phase. The measured product textures were compared with the modeled ones, which were obtained by applying the Bain, Kurdjumov-Sachs and Nishiyama-Wassermann transformation laws on the local austenite grains. It was shown that the presence of a deformation substructure is not an essential prerequisite for the occurrence of variant selection, The data reveal that a variant selection mechanism is active also in not deformed samples, containing a fully recrystallized parent matrix. The nature of the variant selection mechanism is discussed in terms of the elastic anisotropy of the parent phase.

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“…8. The accurate determination of the volume fraction of retained austenite is of great importance for the optimization of TRIP-aided steels and many methods [25][26][27] have been developed to measure retained austenite. Among the developed methods, the analysis using EBSD is most useful when the size distribution of retained austenite is to be determined.…”

Section: Effect Of Aln Precipitation On the Retained Austenite Characmentioning

confidence: 99%

Effects of Nitrogen on the Mechanical Properties of Cold Rolled TRIP-aided Steel Sheets

et al. 2006

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Texture in hot rolled austenite and resulting transformation products

Cited by 75 publications

References 3 publications

Crystallographic Reconstruction Study of the Effects of Finish Rolling Temperature on the Variant Selection During Bainite Transformation in C-Mn High-Strength Steels

Crystallographic Reconstruction Study of the Effects of Finish Rolling Temperature on the Variant Selection During Bainite Transformation in C-Mn High-Strength Steels

Orientation Selective Martensite Transformation in an Fe-28Ni Alloy

Effects of Nitrogen on the Mechanical Properties of Cold Rolled TRIP-aided Steel Sheets

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