Effect of austenite pancaking on texture formation in a plain carbon and A Nb microalloyed steel

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

doi:10.1016/0956-7151(94)90428-6

Cited by 52 publications

(40 citation statements)

References 11 publications

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“…Therefore, it is the most efficient way to control the strength anisotropy by reducing the component proportion of copper texture in the deformed austenite, as well as to reduce the transformation possibility of Goss texture. According to the investigation results, higher deformation temperature can change the texture component of face centered cubic material, increase the component of Brass and S type texture, and correspondingly reduce that of Copper texture [8][9]. Therefore, with the increment of finishing rolling temperature, the {112}<110> texture component becomes lower and the anisotropy problem gets improved.…”

Section: Advances In Engineering Research Volume 146mentioning

confidence: 99%

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Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Niu¹,

Chenggang²,

Wu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-In this study, optical microscope (OM), tensile test, X-ray diffraction (XRD) method were used to investigate the effect of hot rolling parameters on texture and tensile properties of X65MO offshore pipeline steel. Result of microstructure observation reveals that the anisotropy of mechanical properties of X65MO submarine pipeline steel is not due to the different growing direction of grains, but to the different crystal orientations -texture. And the texture mainly consists of near {112}<110>, {111}<112> and {001}<110> for hot rolled X65MO offshore pipeline steel, which depends on the texture of austenite and its revolution during phase transformation process. Increasing the finishing rolling temperature can reduce the density of {112}<110> texture dramatically and correspondingly reduce the anisotropy, while higher deformation will increase {112}<110> component and intensify the anisotropy of strength. Reason analysis suggests that the key point is to reduce the copper texture and increase the others instead. Optimized finishing rolling temperature and transfer bar thickness were recommended based on the investigation.

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Section: Advances In Engineering Research Volume 146mentioning

confidence: 99%

“…As has been revealed, the {112}<110> texture in room temperature microstructure mainly originates in Copper texture of austenite (rolling texture {112}<111>) [8]. When the rolling temperature decreases, copper texture tends to transform to be {112}<110>.…”

Section: Advances In Engineering Research Volume 146mentioning

confidence: 99%

Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Niu¹,

Chenggang²,

Wu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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“…10,36,40) Following the Kurdjumov-Sachs (K-S) relationships, the four most intense fcc deformation components {112}͗111͘ g copper, {110}͗112͘ g B, {123}͗634͘ g S and {110}͗001͘ g G are expected to transform into {112}͗110͘ aЈ , {001}͗110͘ aЈ , {211}͗113͘ aЈ and {112}͗110͘ aЈ bcc texture components. 41) As already suggested by Luksza in its study on cold rolling of AISI 301 steel strip, 42) the following process can be proposed: deformation of austenite, strain-induced transformation of austenite into martensite (g→aЈ) and deformation of martensite.…”

Section: Cold-rolling Texturementioning

confidence: 99%

Fine Grained Austenitic Stainless Steels: The Role of Strain Induced α′ Martensite and the Reversion Mechanism Limitations

Poulon¹,

Brochet²,

Vogt³

et al. 2009

ISIJ Int.

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The effect of the aЈ-strain induced martensite on the austenitic stainless steel grain size reduction is analyzed. Rolling with a 80 % reduction factor at 200°C and at 20°C resulted respectively in a heavily deformed austenite and a mixed deformed austenite with aЈ-martensite bands. Further annealing treatments were carried out in the range of 20-880°C. Fine grains of about 1 mm can be obtained in the metastable austenitic stainless steel by a repetitive cold rolling and annealing thermomechanical process. In this case, reversion mechanism from deformation induced martensite aЈ to austenite g is responsible for grain refining. Nonconventional warm rolling and annealing process can also lead to fine grains of 2 mm without a reversion stage and as a result of recrystallization process of the strain-hardened austenite. The cold rolling route gives rise to a bimodal grain size distribution with a "lamellar" structure resembling to a "composite" material.

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“…The grain size distribution observed in the final ferritic structure may bear a legacy to the retardation of recrystallization of the parent austenite phase, as a consequence of showed together with FCC parent orientations from which they originate. 14) microalloying with Nb, as well as for finish rolling in the intercritical aϩg region.…”

Section: Microstructurementioning

confidence: 99%

Microtexture of Thin Gauge Hot Rolled Steel Strip.

et al. 2003

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A series of trials were conducted on a compact rolling mill to evaluate the properties and characteristics of carbon steel strip hot rolled to less than 2 mm in thickness from thin cast slabs. Steels of two different compositions were studied, the first one, a low carbon steel, was rolled to a total reduction ranging from 94 to 98 %, final thickness ranging from 1.06 to 2.69 mm, whereas the second one was a Nb bearing microalloyed steel rolled to a total reduction of around 96 %. The rolling trials were complemented by means of computer modelling to get a deeper understanding of the process. It was found that the ferritic grain size of the low carbon strips varied from 7 to 10 mm, with the finer sizes found in the thinner strips, the grain size of the microalloyed steel was found to be 3.6 mm. Analysis of the texture of the hot rolled strips indicated that the ferrite in the low carbon resulted from the transformation of recrystallized austenite, in comparison, low intensity transformation texture from unrecrystallized austenite was found in the Nb bearing steel. The observed texture data correlate with the R-values measured.KEY WORDS: hot rolling; steel; texture; microstructure.used with steel of composition A (identified as A1, A2 and A3), whereas only one schedule, similar to that of A2, was applied with steel B. All the samples from either type of materials were cut at room temperature from the coiled product. Coiling of the strips take place at the end of the run out table, which is equipped with a cooling system. The cooling system consists of a series of low pressure laminar water headers located on the top of the strip and low pressure water jet headers from the bottom side. The number of headers being used was controlled by the operators to assure coiling temperature below 650°C. The chemical composition of the steels is shown in Table 1 and the parameters of the rolling schedules together with the measured R and Dr-values are shown in Table 2. The value of critical temperatures A 1 ϭ718°C and A 3 ϭ860°C were calculated with the equations proposed by Andrews.7) The temperature changes in the strips during rolling were predicted by computer modelling, 8) as this approach allows to have an idea whether the final rolling temperature (FRT) stays within the austenite phase field or within the two phase, aϩg, region. The values shown in Table 2 indicate that the final rolling temperatures predicted by the model were above A 3 , without entering the intercritical region for the rolling schedules A1, A2 and B, but not for the thinnest sample (A3), on which the final pass may have been imparted in the intercritical region.Evaluation of the forming characteristics of the hot rolled steels was carried out by testing tensile samples cut parallel, perpendicular and at 45°with respect of the rolling direction. Individual measurements of the instantaneous width and thickness to the samples were made to obtain the strain values as referred to the width and thickness (e w and e t respectively) of the samples. The plasti...

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Effect of austenite pancaking on texture formation in a plain carbon and A Nb microalloyed steel

Cited by 52 publications

References 11 publications

Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Fine Grained Austenitic Stainless Steels: The Role of Strain Induced α′ Martensite and the Reversion Mechanism Limitations

Microtexture of Thin Gauge Hot Rolled Steel Strip.

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Effect of austenite pancaking on texture formation in a plain carbon and A Nb microalloyed steel

Cited by 52 publications

References 11 publications

Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Effect of Hot Rolling Parameters on Texture and Anisotropy of X65MO offshore pipeline steel

Fine Grained Austenitic Stainless Steels: The Role of Strain Induced &alpha;&prime; Martensite and the Reversion Mechanism Limitations

Microtexture of Thin Gauge Hot Rolled Steel Strip.

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Fine Grained Austenitic Stainless Steels: The Role of Strain Induced α′ Martensite and the Reversion Mechanism Limitations