scholarly journals Microstructure Evolution and Tensile Behaviour of a Cold Rolled 8 Wt Pct Mn Medium Manganese Steel

2021 ◽  
Author(s):  
T. W. J. Kwok ◽  
P. Gong ◽  
X. Xu ◽  
J. Nutter ◽  
W. M. Rainforth ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Intercritical Annealing ◽  
Tensile Tests ◽  
Rolling Reduction ◽  
Manganese Steel ◽  
Tensile Behaviour ◽  
Significant Drop ◽  
Cold Rolling Reduction ◽  
Medium Manganese Steel ◽  
Cold Rolled

AbstractA novel medium manganese steel with composition Fe–8.3Mn–3.8Al–1.8Si–0.5C–0.06V–0.05Sn was developed and thermomechanically processed through hot rolling and intercritical annealing. The steel possessed a yield strength of 1 GPa, tensile strength of 1.13 GPa and ductility of 41 pct. In order to study the effect of cold rolling after intercritical annealing on subsequent tensile properties, the steel was further cold rolled up to 20 pct reduction. After cold rolling, it was observed that the strain hardening rate increased continuously with increasing cold rolling reduction but without a significant drop in ductility during subsequent tensile tests. The microstructural evolution with cold rolling reduction was analysed to understand the mechanisms behind this phenomena. It was found that cold rolling activated additional twinning systems which provided a large number of potent nucleation sites for strain induced martensite to form during subsequent tensile tests in what can be described as an enhanced TRIP effect.

scholarly journals Microstructure and Mechanical Properties of 4Al Alumina-Forming Austenitic Steel after Cold-Rolling Deformation and Annealing

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2767 ◽  
Author(s):  
Chenchen Jiang ◽  
Qiuzhi Gao ◽  
Hailian Zhang ◽  
Ziyun Liu ◽  
Huijun Li
Keyword(s):  
Grain Size ◽  
Cold Rolling ◽  
Grain Boundaries ◽  
Austenitic Steel ◽  
Rolling Reduction ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Cold Rolling Reduction ◽  
Average Grain Size ◽  
Cold Rolled

Microstructural evolutions of the 4Al alumina-forming austenitic steel after cold rolling with different reductions from 5% to 30% and then annealing were investigated using electron backscattering diffraction (EBSD), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Tensile properties and hardness were also measured. The results show that the average grain size gradually decreases with an increase in the cold-rolling reduction. The low angle grain boundaries (LAGBs) are dominant in the cold-rolled samples, but high angle grain boundaries (HAGBs) form in the annealed samples, indicating that the grains are refined under the action of dislocations. During cold rolling, high-density dislocations are initially introduced in the samples, which contributes to a large number of dislocations remaining after annealing. With the sustaining increase in cold-rolled deformation, the samples exhibit more excellent tensile strength and hardness due to the decrease in grain size and increase in dislocation density, especially for the samples subjected to 30% cold-rolling reduction. The contribution of dislocations on yield strength is more than 60%.

Effect of Cold-Rolling Reduction on Recrystallized Annealing Microstructure and Texture of Titanium Stabilized Interstitial Free Steel

2012 ◽  
Vol 581-582 ◽  
pp. 1010-1013
Author(s):  
Gong Ting Zhang ◽  
Zhi Wang Zheng ◽  
Min Li Wang
Keyword(s):  
Cold Rolling ◽  
Salt Bath ◽  
Rolling Reduction ◽  
Interstitial Free ◽  
Texture Measurement ◽  
Cold Rolling Reduction ◽  
Interstitial Free Steel ◽  
Cold Rolled ◽  
Evolution Of Microstructure ◽  
Annealing Microstructure

Cold rolling and salt bath annealing simulation were conducted to study the evolution of microstructure and textures of a commercially produced Titanium stabilized interstitial free steel by means of optical microscopy and X-ray texture measurement. The results show that all of the as cold-rolled specimens are completely recrystallized after annealing. As the cold-rolling reduction increases, the recystallized ferrite grains are refined, The intensities of the stable {114} and {223} components remain strong after recrystallization. The orientation intensity of the {111} and {111} also increases accordingly. As the cold-rolling reduction increases to 90%, the intensity of {111} tend to be higher than that of {111}.

Analysis of medium manganese steel through cold-rolling and intercritical annealing or warm-rolling

2018 ◽  
Vol 35 (17) ◽  
pp. 2120-2133 ◽  
Author(s):  
Aline Silva Magalhães ◽  
Carlos Eduardo dos Santos ◽  
Aline Oliveira Vasconcelos Ferreira ◽  
Davi Silva Alves ◽  
Dagoberto Brandão Santos
Keyword(s):  
Cold Rolling ◽  
Intercritical Annealing ◽  
Warm Rolling ◽  
Manganese Steel ◽  
Medium Manganese Steel

Influence of Cold Rolling Reduction and Cross Rolling on Recrystallization Texture Formation in Electro Deposited Pure Iron with a Sharp and Homogeneous //ND Fiber

2014 ◽  
Vol 783-786 ◽  
pp. 313-318
Author(s):  
Naoki Yoshinaga ◽  
Dirk Vanderschueren ◽  
Leo Kestens ◽  
Kohsaku Ushioda ◽  
Natsuko Sugiura
Keyword(s):  
Cold Rolling ◽  
Pure Iron ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Rolling Reduction ◽  
Rolled Sheet ◽  
Texture Formation ◽  
Annealing Texture ◽  
Cold Rolling Reduction ◽  
Cold Rolled

The cold rolling and annealing texture formation has been investigated in electro deposited pure iron which has an extremely sharp and isotropic <111>//ND fiber. Regardless of cold rolling reduction, {111}<112> intensified texture is formed after cold rolling. Similar texture remains after recrystallization in 65% cold rolled material while {111}<110> type texture forms in 80% and 90% cold rolled ones. The recrystallized grains at the stage of 5% recrystallization have {111}<112> orientation in 65% cold rolled sheet, whereas {111}<110> is observed in 80% cold rolled one. From this aspect, it is considered that the nucleation orientation plays an important role in the recrystallization texture formation. In the meanwhile, the growth of the recrystallized nuclei is also supposed to affect the recrystallization texture formation. The nuclei with {111}<112> orientation in lightly cold rolled sheet are easier to consume the deformed matrix than they do in heavily cold rolled sheets because their frequency to encounter a deformed grain with nearly the same orientation is much smaller in lightly cold rolled specimen, which can result in a large mobility for growth. Cross cold rolling makes cold rolling texture rather homogeneous <111>//ND fiber, which gives rise to an almost homogeneous <111>//ND fiber after annealing.

Formation of an Ultrafine-Grained Austenite-Containing Microstructure from a Cold-Rolled Medium-Manganese Steel Processed Using Intercritical Annealing

2013 ◽  
Vol 762 ◽  
pp. 31-37 ◽  
Author(s):  
Han Dong ◽  
Wen Quan Cao ◽  
Jie Shi
Keyword(s):  
Volume Fraction ◽  
Intercritical Annealing ◽  
Grain Structure ◽  
Manganese Steel ◽  
High Angle ◽  
Annealing Behavior ◽  
Misorientation Distribution ◽  
Ultrafine Grained ◽  
Medium Manganese Steel ◽  
Cold Rolled

The behavior of 60% cold-rolled medium-manganese steel (0.1C5Mn) during intercritical annealing, has been examined using various techniques. Microstructural observations showed a slight coarsening of the subgrain/grain structure during intercritical annealing, without any apparent change in the misorientation distribution. In addition, the formation of ultrafine austenite grains took place mainly at high-angle boundaries and rarely at low angle boundaries, suggesting a heterogeneous austenite nucleation process in this steel. The results indicated that the annealing behavior of cold rolled medium manganese steels is controlled by the extensive recovery of the ferrite phase and formation of austenite phase with an austenite volume fraction of ~20%. It was proposed that the segregation of manganese and carbon to high-angle boundaries promoted austenite nucleation and growth, as such segregation decreases the Gibbs energy of austenite.

scholarly journals Influence of Grain Refinement of Hot Band and Cold Rolling Reduction on the Formation of Textures and R-Value of Cold Rolled Plain Extralow-Carbon Steel Sheets

1997 ◽  
Vol 30 (1-2) ◽  
pp. 97-123 ◽  
Author(s):  
Takehide Senuma ◽  
Natsuko Hashimoto
Keyword(s):  
Carbon Steel ◽  
Cold Rolling ◽  
Textural Analysis ◽  
Rolling Reduction ◽  
Planar Anisotropy ◽  
Steel Sheets ◽  
Cold Rolling Reduction ◽  
Hot Band ◽  
Cold Rolled ◽  
R Value

A textural analysis was carried out to explain the cause of the planar anisotropy of r-value of cold rolled plain extralow-carbon steel sheets. For a detailed analysis, a model for calculating r-values from ODF-data of texture was applied and the influence of each or a group of crystal orientations of the recrystallization texture on the planar anisotropy of r-values was studied. The following results were obtained:A development of {111}〈110〉−{443}〈110〉−{332}〈110〉−{221}〈110〉 enhanced the V-type planar anisotropy of r-values. A decrease in the intensity of these orientations by increasing the cold rolling reduction or the refinement of the hot band microstructure reduced the r-values in L and C directions and hardly affected the r-value in D direction, and as a result, the V-type planar anisotropy of r-values was improved. On the other hand, an increase in the intensity of {111}, {334} orientation by increasing the cold rolling reduction or the refinement of the hot band microstructure raised r-values in sequence of L < D < C directions and contributed to the reduction of V-type planar anisotropy of r-values as a whole.

The Characteristic of Microstructures and Mechanical Properties of a Cu-Ag In Situ Composite Material

2014 ◽  
Vol 915-916 ◽  
pp. 654-659
Author(s):  
Guo Liang Xie ◽  
Qiang Song Wang ◽  
Qing Miao Guo ◽  
Xu Jun Mi ◽  
Bai Qing Xiong
Keyword(s):  
Mechanical Properties ◽  
Cold Rolling ◽  
Strengthening Mechanism ◽  
Rolling Reduction ◽  
Goss Texture ◽  
Cold Rolling Reduction ◽  
Phase Layers ◽  
Cold Rolled ◽  
Good Agreement

A Cu-24 wt % Ag composite alloy is prepared to reveal the evolutions of microstructures, mechanical properties and textures formed by cold rolling. A typical alternating distribution of Cu and Ag phase layers is observed, which becomes much finer with increasing cold rolling reduction. Copper texture ((112)<11-1> texture) and Goss texture ((110)<001> texture) with high intensities are found in the Cu phase of cold rolled samples. Ag phase containing strong Goss texture and weak Brass texture are observed, quite different from the case in cold rolled pure Ag. Significant change of textures, from the Goss texture to (111) textures with increasing rolling reduction, has been found of Ag phase. The strengthening mechanism of this Cu-Ag composite is described by a equation similar to the HallPetch relationship, the fitted results based on which shows good agreement with the experimental data when the layer thickness is lower than 100-200 nm.

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