Texture Evolution of IF-Steel Sheets Processed by Equal-Channel Angular Sheet Extrusion (ECASE)

2011 ◽  
Vol 702-703 ◽  
pp. 123-126
Author(s):  
Onur Saray ◽  
Gencaga Purcek ◽  
B. Mahato ◽  
Sandip Ghosh Chowdhury
Keyword(s):  
Grain Boundaries ◽  
Tensile Properties ◽  
Equal Channel Angular Extrusion ◽  
Texture Evolution ◽  
Dislocation Cell ◽  
Interstitial Free ◽  
If Steel ◽  
Steel Sheets ◽  
Interstitial Free Steel ◽  
Sheet Extrusion

Interstitial-Free steel (IF-steel) sheets were severe plastically deformed using a continuous equal-channel angular extrusion/pressing technique called “Equal-Channel Angular Sheet Extrusion (ECASE). After processing, texture development as well as microstructural alteration and tensile properties were investigated. The microstructural investigations revealed that the processed sheets exhibited a dislocation cell and/or subgrain structures with mostly low angle grain boundaries. It was also observed that the strength of the processed sheets increased substantially after ECASE processing in the expense of ductility. It was shown that the ECASE has moderate influence on the texture of IF-steel sheets through route A. Intially there was θ partial fiber which changes to {110}θ with straining.

Effect of Micro-Alloying Elements of Ti, Nb and B on Recrystallization Behavior of Cold-Rolled Interstitial-Free Steel Sheets

2013 ◽  
Vol 753 ◽  
pp. 207-212 ◽  
Author(s):  
Xin Li Song ◽  
Kun Peng ◽  
Ze Xi Yuan ◽  
W.W. Zhu ◽  
J. Jia ◽  
...  
Keyword(s):  
Annealing Temperature ◽  
Fibrous Tissue ◽  
Alloying Elements ◽  
Recrystallization Temperature ◽  
Interstitial Free ◽  
If Steel ◽  
Recrystallization Behavior ◽  
Steel Sheets ◽  
Interstitial Free Steel ◽  
Cold Rolled

The effect of micro-alloying elements of niobium and boron and titanium on recrystallization behavior is researched after the cold rolled IF steels are annealed at high temperature. The results show that there is high density dislocation in the cold rolled steel and the microstructure is fibrous tissue. The recrystallization grains appear when the cold steel annealed at 655 °C and then the grains grow up with the annealing temperature increased to 840 °C. The recrystallization temperature and time of B-Ti-IF steel is lower than that of Nb-Ti-IF and Ti-IF steels. The recrystallization activation energy of Nb-Ti-IF steel is 181.7KJ/mol which is 56.6KJ/mol larger than that of B-Ti-IF steel.

scholarly journals Characterization of Texture Evolution during Recrystallization by Laser-Induced Transient Thermal Grating Method

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 288 ◽  
Author(s):  
Anmin Yin ◽  
Xiaodong Xu ◽  
Shuyi Zhang ◽  
Christ Glorieux ◽  
Xuedao Shu ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Texture Evolution ◽  
Surface Acoustic Waves ◽  
Interstitial Free ◽  
If Steel ◽  
Steel Sheets ◽  
Individual Crystal ◽  
Thermal Grating ◽  
Velocity Changes ◽  
Transient Thermal

The analyses of texture evolution of cold rolled interstitial free (IF) steel sheets during annealing and recrystallization are presented, in which the dispersion curves of surface acoustic waves (SAW) excited by laser-induced transient thermal grating method are measured. The results show that the angular anisotropy of the SAW velocity changes due to the texture changes at different stages of recrystallization. The theoretically simulated angular dispersion of SAW velocity within individual crystal revealed that the change of SAW velocity is closely related to recrystallization texture evolution. A model for the angular dependence of the SAW velocity in textured polycrystalline IF steel with different oriented crystals is presented and the simulations are yielded, which show that the results agree with those of experiments.

Microstructure and Texture Evolutions in a Short-Time-Annealed Interstitial-Free Steel

2013 ◽  
Vol 753 ◽  
pp. 169-172
Author(s):  
Juan Jia ◽  
Wei Wei Zhu ◽  
Heng Gao ◽  
Li Bin Dai ◽  
Meng Li ◽  
...  
Keyword(s):  
Recrystallization Texture ◽  
Texture Evolution ◽  
High Strength ◽  
Salt Bath ◽  
Interstitial Free ◽  
Steel Sheets ◽  
Initial Stage ◽  
Interstitial Free Steel ◽  
Short Time ◽  
Electron Back Scattered Diffraction

One kind of high strength interstitial free steel sheets are annealed in a salt bath at 810 C for different times (1-30 s). The microstructure and recrystallized texture evolution during annealing are investigated using the optical microscopy and the Electron Back Scattered Diffraction technique. The results show that beginning and finishing of recrystallization are observed in the sample annealed at 810 C for 8 and for 20 s, respectively. The recrystallized grains nucleate in the order of ‹111›//ND, ‹110›//ND and ‹100›//ND. Recrystallized grains with ‹111›//ND orientation nucleate firstly in the ‹111›//ND deformed grains as well as at their boundaries and grow up by consuming the ‹111›//ND deformed grains at the initial stage of recrystallization. The ‹111›//ND recrystallized grains grow up by depleting the remained formed ‹100›//ND grains after the full consumption of the ‹111›//ND deformed grains. The overall recrystallization texture is mainly the ‹111›//ND component in the steel.

Precipitation Behavior of Warm-Rolled Ti-Stabilized Interstitial-Free (IF) Steel Sheets

2007 ◽  
Vol 353-358 ◽  
pp. 1653-1656 ◽  
Author(s):  
Fu Tao Han ◽  
Zuo Cheng Wang ◽  
Cai Nian Jing ◽  
Wen Ping Zhang
Keyword(s):  
Texture Evolution ◽  
Great Influence ◽  
High Strength ◽  
Recrystallization Annealing ◽  
Interstitial Free ◽  
If Steel ◽  
Precipitation Behavior ◽  
Steel Sheets ◽  
Energy Dispersion Spectrometer ◽  
Transmission Electron

Precipitates have great influence on the recrystallization, texture evolution and thus the final mechanical properties of the Interstitial-Free (IF) steel sheets, however, very few studies have dealt with the precipitation behavior of IF steels warm rolled in ferrite region. In the present work, the precipitate characteristics (type, morphology, size and amount) of warm-rolled ordinary Ti-stabilized Interstitial-Free (Ti-IF) steel and p-added high-strength Ti-IF steel were investigated by Transmission Electron Microscope (TEM) and Energy Dispersion Spectrometer (EDS). The results show that most precipitates in warm-rolled ordinary Ti-IF steels are TiN, TiS, Ti4C2S2 and TiC. Besides these precipitates, a great amount of FeTiP precipitates exist in warm-rolled P-added high-strength Ti-IF steel. The precipitation of FeTiP retards the migration of grain boundary in the recrystallization annealing, so the {111} texture and thus deep drawability of warm-rolled high-strength Ti-IF steel is deteriorated.

Microstructure and Texture Evolution in Interstitial-Free (IF) Steel Processed by Multi-Axial Forging

2011 ◽  
Vol 702-703 ◽  
pp. 774-777 ◽  
Author(s):  
Ayan Bhowmik ◽  
Somjeet Biswas ◽  
Satyaveer Singh Dhinwal ◽  
Apu Sarkar ◽  
Ranjit Kumar Ray ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Yield Strength ◽  
Severe Plastic Deformation ◽  
Texture Evolution ◽  
Fold Increase ◽  
Interstitial Free ◽  
If Steel ◽  
Considerable Heterogeneity ◽  
Interstitial Free Steel ◽  
First Time

In this study, severe plastic deformation (SPD) of Ti-bearing interstitial-free steel was carried out by multi-axial forging (MAF) technique. The grain refinement achieved was comparable to that by other SPD techniques. A considerable heterogeneity was observed in the microstructure and texture. Texture of multi-axially forged steels has been evaluated and reported for the first time. The material exhibited a six-fold increase in the yield strength after four cycles of MAF.

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