Transformation Textures in Steels.

Ray, R.K.; Jonas, John J.; Butrón-Guillén, M.P.; Savoie, Jean

doi:10.2355/isijinternational.34.927

Cited by 165 publications

(86 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Transformation textures for the bcc to fcc transformation in steel has been extensively studied. 51 The textures observed here are consistent with a phase transformation following the Kurdjumov and Sachs orientation relationship 52 in which {111} fcc // {1-10} bcc and 〈1-10〉 fcc // 〈111〉 bcc (Figure 7, inset). In this case the 100 and 111 maxima in the bcc phase correspond to the 110 maximum for the fcc phase ( Figure 7, # B 139(α) and # 133(γ)).…”

Section: Iii-iv High Temperature Texturesupporting

confidence: 67%

In situ phase transformation and deformation of iron at high pressure and temperature

Miyagi

Kunz

Knight

et al. 2008

Journal of Applied Physics

View full text Add to dashboard Cite

With a membrane based mechanism to allow for pressure change of a sample in a radial diffraction diamond anvil cell (rDAC) and simultaneous infra-red laser heating, it is now possible to investigate texture changes during deformation and phase transformations over a wide range of temperature-pressure conditions. The device is used to study bcc (α), fcc (γ) and hcp (ε) iron. In bcc iron, room temperature compression generates a texture characterized by (100) and (111) poles parallel to the compression direction. During the deformation induced phase transformation to hcp iron, a subset of orientations are favored to transform to the hcp structure first and generate a texture of (01-10) at high angles to the compression direction. Upon further deformation, the remaining grains transform, resulting in a texture that obeys the Burgers relationship of (110) bcc // (0001) hcp . This is in contrast to high temperature results that indicate that texture is developed through dominant pyramidal 〈a+c〉 {2-1-12}〈2-1-13〉 and basal (0001)〈2-1-10〉 slip based on polycrystal plasticity modeling. We also observe that the high temperature fcc phase develops a 110 texture typical for fcc metals deformed in compression.

show abstract

Section: Iii-iv High Temperature Texturesupporting

confidence: 67%

In situ phase transformation and deformation of iron at high pressure and temperature

Miyagi

Kunz

Knight

et al. 2008

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…[1][2][3] In γ that has a similar stacking fault energy to pure copper, Ni-30%Fe and Ni-30%Co, deformation textures are thought to develop with the major components lying around the {211}<111> and {110}<112> orientations during hot rolling, whilst subsequent recrystallization generally causes the evolution of the cubic texture of {100}<001>. Those developed textures in γ are then inherited into the texture of α by a rather rigorous orientation relationship such as Kurdjumov-Sachs relation.…”

Section: Introductionmentioning

confidence: 99%

“…4) The inherited texture in hotrolled steel sheets sometimes becomes as intense as that in the annealing texture of cold-rolled steel sheets for deep drawing, and it thus largely influences the properties of the steel. [1][2][3] However, the prediction of such transformation texture in hot-rolled steel sheets has not been thoroughly resolved and is still a central question in metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Transformation Texture in Hot-rolled Steel Sheets and Its Quantitative Prediction

Tomida¹,

Wakita²

2012

ISIJ Int.

View full text Add to dashboard Cite

Crystallographic textures of ferrite, bainite and martensite in hot-rolled steel sheets are thought to be inherited from developed textures of austenite due to the orientation relationship between austenite and the product phases. However, despite numerous investigations, there is still much difficulty in predicting such transformation textures. In this article, the present state of the prediction of transformation texture in hot-rolled steel as well as a recently proposed method that enables the quantitative prediction of the transformation texture are described. As the orientation relationship is assumed to be fulfilled not only between a nucleating ferrite particle and an adjoining austenite grain but also between the same ferrite and another adjoining austenite grain, the derived variant selection rule can provide us with a remarkable reproduction of the ferritic texture in hot-rolled steel sheets from the texture of prior austenite, and vice versa.

show abstract

“…The transformation texture in microalloyed IF steels has been extensively investigated. [1][2][3][4][5][6][7] According to these studies the resultant texture of the ferrite depends basically on the deformation temperature, i.e. whether the austenite is recrystallized or unrecrystallized before phase transformation.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

et al. 2004

View full text Add to dashboard Cite

The effect of chemical composition and ferritic hot rolling on the formation of texture in the hot rolled and coiled, cold rolled, and cold rolled and annealed ultra-low carbon steels was studied. One of the experimental steels was fully stabilized with respect to carbon, whereas two others were expected to have some carbon in solution under equilibrium conditions. The steels were processed to yield mainly gamma fiber texture intensities in the austenitically hot rolled condition. Three different thermomechanical treatments were applied, including rolling in the ferrite temperature region. After hot rolling and coiling, the steels were cold rolled and annealed. The crystallographic orientations for each condition were presented in the form of socalled skeleton plots along the RD-, TD-and ND-fibers. It was found that the resulting texture in the hot rolled and coiled as well as in the cold rolled and annealed steels was dependent on the degree of recrystallization of the ferritic substructure. A well-advanced state of recrystallization eliminated the detrimental rotated cube component, leaving behind texture with a complete gamma fiber. The average strain ratio, measured for the cold rolled and annealed steels, increased with advancing state of recrystallization and increasing intensity of the {111} ͗110͘ texture component. It was also found that adding 100 ppm of Nb to the Ti alloyed ULC steel increased the average strain ratio by 15 % at a given {111} ͗110͘ texture intensity.KEY WORDS: ultra-low carbon steel; thermomechanical processing; hot rolling; ferritic rolling; cold rolling; annealing; texture; average strain ratio.cube component is drastically reduced. [20][21][22][23] Most of this work has been done by deforming steels solely in the austenitic temperature region. The present work studies the effect of ferritic hot rolling on the evolution of crystallographic orientation in Ti and TiϩNb alloyed ULC steels during hot deformation and coiling as well as during subsequent cold rolling and annealing. The experimental steels were processed to yield an extra large austenitic grain size during reheating, which combined with high reductions per pass are expected to produce mainly gamma fiber intensities in the hot bands that have been subjected to deformation in the austenitic region only. Experimental Procedure Materials and ProcessingThe three steels studied in this work were vacuum induction melted laboratory ingots, the chemical composition of which is given in Table 1. Steels 1 and 2 are alloyed with Ti and Nb, whereas steel 3 has Ti only. According to the stabilization maps developed by Hua et al.,24) steel 1 is fully stabilized with respect to carbon, whereas, under equilibrium, steels 2 and 3 are expected to have some carbon in solution, see Table 2. Most of the carbon is tied in MC (MϭNb and/or Ti) and Ti 4 C 2 S 2 precipitates. It can be seen in Table 2 that, under equilibrium, steel 1 has over half of its Nb content and one fourth of its Ti content in solution, whereas in steels 2 and 3 all Nb and Ti...

show abstract

Transformation Textures in Steels.

Cited by 165 publications

References 2 publications

In situ phase transformation and deformation of iron at high pressure and temperature

In situ phase transformation and deformation of iron at high pressure and temperature

Transformation Texture in Hot-rolled Steel Sheets and Its Quantitative Prediction

Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing

Contact Info

Product

Resources

About