scholarly journals Deformation and Recrystallization Textures in a C–Si–Mn–V Dual Phase Steel

1993 ◽  
Vol 21 (1) ◽  
pp. 39-53 ◽  
Author(s):  
D. K. Mondal ◽  
R. K. Ray
Keyword(s):  
Distribution Function ◽  
Orientation Distribution Function ◽  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Orientation Distribution ◽  
Dual Phase ◽  
Phase Structures ◽  
Cold Rolled ◽  
The Difference ◽  
Lower Temperature

Dual phase structures were produced in a C–Si–Mn–V steel from both ferrite-pearlite and martensitic structures by intercritical annealing at 750℃ and 810℃. Samples with different distributions of ferrite and martensite were cold rolled 60% and then recrystallized at 650℃ and 800℃ for different lengths of time. Texture measurements were carried out on the cold rolled as well as recrystallized materials using both the conventional pole-figure and ODF (Orientation Distribution Function) methods. The results indicated the presence of a reasonably strong 〈111〉 ∥ ND fibre in the cold deformed alloy. The textures in the recrystallized condition were found to be basically similar to the ones for the corresponding cold deformed materials, with the difference that the pole densities were somewhat weaker in the former. A weak {11,11,4} fibre and a weak and incomplete {337} fibre have also been observed in both the cold deformed and recrystallized materials. Samples recrystallized at the lower temperature of 650℃ exhibited a sharper {111} texture as compared to the 800℃ annealed materials and this difference in texture intensities were perceptibly reflected in the corresponding r-values.

Effect of Intercritical Annealing Temperature on Development of Cold Rolled Dual Phase Steel from Q345 Steel

2013 ◽  
Vol 313-314 ◽  
pp. 693-696
Author(s):  
Ji Yuan Liu ◽  
Fu Xian Zhu ◽  
Shi Cheng Ma
Keyword(s):  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Simulation Experiment ◽  
Intercritical Annealing ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Automotive Applications ◽  
Treatment Procedure ◽  
Annealing Temperatures ◽  
Cold Rolled

Cold rolled dual phase steel was developed from Q345 steel by heat treatment procedure for automotive applications. The ultimate tensile strength was improved about 100MPa higher than the traditional cold-rolled Q345 steel in the continuous annealing simulation experiment. The microstructure presented varied characteristics in different intercritical annealing temperatures; mechanical properties were changed correspondingly as well. The chief discussions are focus on the recrystallization, hardenability of austenite and martensite transformation in the experiment.

Austenite formation during intercritical annealing in C-Mn cold-rolled dual phase steel

2015 ◽  
Vol 22 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Sheng-ci Li ◽  
Yong-lin Kang ◽  
Guo-ming Zhu ◽  
Shuang Kuang
Keyword(s):  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Austenite Formation ◽  
Dual Phase ◽  
Cold Rolled

Calculation of the crystal orientation distribution function from synchrotron radiation experimental data

1989 ◽  
Vol 22 (6) ◽  
pp. 559-561 ◽  
Author(s):  
J. A. Szpunar ◽  
P. Blandford ◽  
D. C. Hinz
Keyword(s):  
Experimental Data ◽  
Distribution Function ◽  
Synchrotron Radiation ◽  
Orientation Distribution Function ◽  
Crystal Orientation ◽  
Orientation Distribution ◽  
Pole Figures ◽  
Cold Rolled ◽  
Expansion Coefficients ◽  
Crystal Orientation Distribution Function

Series-expansion coefficients for an orientation distribution function (ODF) of cold-rolled aluminium sheet were calculated from the intensity of Debye–Scherrer rings obtained in an experiment using synchrotron radiation. Calculated and observed pole figures demonstrate that a sufficiently good approximation to the ODF is obtained from coefficients calculated to l = 8.

scholarly journals Correlations Between the Rolling Textures in FCC Ni–Co Alloys and the BCC Transformation Textures in Controlled Rolled Steels

1990 ◽  
Vol 12 (1-3) ◽  
pp. 141-153 ◽  
Author(s):  
R. K. Ray ◽  
Ph. Chapellier ◽  
J. J. Jonas
Keyword(s):  
Distribution Function ◽  
Orientation Distribution Function ◽  
Rolling Texture ◽  
Orientation Distribution ◽  
Variant Selection ◽  
Rolled Steel ◽  
Orientation Relationships ◽  
Cold Rolled ◽  
Co Alloys ◽  
Stacking Fault Energies

Three fcc Ni–Co alloys with different stacking fault energies (SFE's) were cold rolled 95% and their textures were characterized by the orientation distribution function (ODF) method. BCC transformation textures were calculated from these experimental textures using three different orientation relationships for the γ→α transformation. The transformed ODF's derived from the Bain relationship were much sharper than the ones deduced from the Kurdjumov–Sachs (K–S) or the Nishiyama–Wassermann (N–W) relations. The ferrite texture determined on a controlled rolled steel, heavily deformed in the unrecrystallized γ region, agrees reasonably well with the bcc texture calculated using the K–S relation from the rolled Ni–Co alloy with similar SFE. The major texture components of the ferrite, namely {332}〈113〉 and {311}〈011〉, are found to originate from the two major rolling texture components of the austenite, i.e. the {110}〈112〉(Bs) and {112}〈111〉(Cu), respectively. Such ferrite transformation from heavily deformed austenite seems to follow the K–S relationship without any variant selection. By contrast, the texture of the martensite produced from deformed austenite appears to involve significant amounts of variant selection.

Study of the Difference in Microstructures and Properties of Cold Rolled Dual Phase Steel with Different Composition

2012 ◽  
Vol 251 ◽  
pp. 351-354
Author(s):  
Hui Wang ◽  
Cheng Jiang Lin ◽  
Zhao Jun Deng ◽  
Ji Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Yield Strength ◽  
Grain Boundaries ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
High Tensile Strength ◽  
Cold Rolled ◽  
The Difference

The difference in microstructures and properties of 600MPa cold rolled dual phase steel with the different composition had been studied in this paper. It can be noticed that the Si-Mn-Cr steel have finer ferrite and more martensite whose content is about 25%; the Mn-Cr-Mo steel have coarser ferrite and some coarse pearlite as well as little martensite; the microstructures of the Mn-Al-Mo steel are consist of mainly ferrite which have even grain size and 16% martensite which distributed homogenously along the ferrite grain boundaries. The difference in microstructure makes the steel own the different properties. The Si-Mn-Cr steel has the highest tensile strength and yield strength but the worst elongation, the Mn-Cr-Mo steel has the lowest tensile strength, the Mn-Al-Mo steel has the an excellent mechanical properties with low yield strength and high tensile strength as well as higher elongation.

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