scholarly journals Strengthening the {111} Texture in Steel Sheet by Increasing the Level of Solute Carbon During Cold Rolling

2000 ◽  
Vol 34 (1) ◽  
pp. 1-22 ◽  
Author(s):  
M. R. Barnett ◽  
L. Kestens
Keyword(s):  
Cold Rolling ◽  
Annealing Treatment ◽  
Single Step ◽  
Annealing Texture ◽  
Texture Intensity ◽  
Fine Grain ◽  
Cold Rolling And Annealing ◽  
Solute Carbon ◽  
Hot Band ◽  
High Level

A series of cold rolling and annealing experiments were conducted to examine the influence of solute carbon during cold rolling on the annealing texture. Hot band samples with grain sizes of 8 and 47 µm were used and rolling was carried out to reductions of 70% and 85%. Two levels of solute carbon were obtained prior to cold rolling by quenching and overaging. Recrystallization textures were measured following single and two step isothermal annealing treatments. In the latter, the level of solute carbon is lowered prior to the commencement of recrystallization. For the single step treatment, the {111} texture intensity was lower in all the samples that had a high level of solute carbon present during rolling. However, when the two step annealing treatment was employed a different trend emerged. Under these circumstances, the fine grain size high rolling reduction sample showed a stronger {111} texture after annealing when the solute carbon level was high during rolling.

The Microstructure Evolution and Control of Alloy 690 during Cold Rolling

2013 ◽  
Vol 573 ◽  
pp. 95-103
Author(s):  
Zhi Hao Yao ◽  
Jian Xin Dong ◽  
Zhi Yong He ◽  
Mai Cang Zhang
Keyword(s):  
Cold Rolling ◽  
Microstructure Evolution ◽  
Dwell Time ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Strain Range ◽  
Strain Rates ◽  
Alloy 690 ◽  
Cold Rolling And Annealing ◽  
And Control

The microstructure evolution and control for Alloy 690 during cold rolling and annealing treatment was investigated. Cold rolling specimens were deformed in the strain range from 15% to 70% with strain rates from 0.01 to 10s-1. Subsequent annealing treatment was carried out in the range of 1060~1100°C for dwell time 3~15mins. Rolling reduction, annealing temperature and annealing time except strain rate had obviously influence on grain size and hardness. Little coarsening of grains were observed below 1060°C during annealing treatment, whereas grains coarsened obviously over 1080°C. Besides, the behavior of grain growth for alloy 690 was investigated systematically.

scholarly journals Investigation on the Texture of an ELC-BH Sheet With Very High R−-Value Processed by New Technology

1995 ◽  
Vol 23 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Guan Xiaojun ◽  
Wang Xianjin ◽  
Wu Qiulin ◽  
Hu Xiaojun
Keyword(s):  
Cold Rolling ◽  
New Technology ◽  
Sheet Steel ◽  
Rolling Texture ◽  
High Strength ◽  
Low Carbon ◽  
Annealing Texture ◽  
Cold Rolling And Annealing ◽  
Cold Rolling Texture ◽  
Very High

The texture of an extra low-carbon and high strength bake-hardening sheet steel (i.e. ELC-BH sheet) processed in our laboratory through a new invented technology has been investigated by means of ODF method, so that the cause of the very high r¯-value of this sheet has been discovered. Experimental results are shown as follows: ① The r¯-value of the experimental sheet treated by the new process is as high as 2.67 and this is the highest r¯-value published so far for phosphorus – added high strength and deep drawing sheet steels. At the same time, the contradiction between deep-drawability and strengthening is successfully solved too. ② A nucleus of the new technology is supplying a good cold rolled parent state which benefits to the development of {111} annealing textures through controlling texture, while strong development of {111} annealing textures can cause very high r¯-value. ③ The cold rolling and annealing texture obtained by the new technology are quite different as compared with that of conventional process. New cold rolling texture has stronger {111} components and weaker {100} components than conventiopnal cold rolling texture. The concentrations of {111} components of new annealing texture are not only distinctly general increase but also the crystal orientations corresponding to the peak values of orientation concentrations of the texture have been also changed from conventional (1¯11)[11¯2] orientations to (1¯11)[01¯1] orientations.

Microstructure and Texture Development in Ti-5Al-5Mo-5V-3Cr Alloy during Cold Rolling and Annealing

2013 ◽  
Vol 551 ◽  
pp. 210-216 ◽  
Author(s):  
Alireza Ghaderi ◽  
Peter D. Hodgson ◽  
Matthew R. Barnett
Keyword(s):  
Cold Rolling ◽  
Electron Backscatter Diffraction ◽  
Texture Evolution ◽  
Shear Bands ◽  
Annealing Treatment ◽  
Β Phase ◽  
Three Samples ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Phase Sample

This study focuses on the microstructure and texture evolution of a Ti-5Al-5Mo-5V-3Cr alloy during cold rolling and annealing treatments. Three samples with different initial microstructures were cold rolled to a 40% reduction in thickness. The starting microstructure of one sample was single β phase while two other specimens were α+β phases with different α particle sizes, distributed in β grains. For all three samples, the average size of primary β grains was 150 µm. The cold rolled specimens were then annealed at 860 °C (10 °C above the β transus temperature) for 5 minutes followed by water quenching. Microstructure development during cold rolling and recrystallization was studied by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) technique. Microstructure investigations showed that massive amount of shear bands occurred during the cold rolling of the single β phase sample while only a few shear bands were observed in the α+β cold rolled microstructures. The cold rolled texture of the sample comprised of a single β phase contains a gamma fibre (//ND) and a partial alpha fibre (//RD). Annealing treatment decreased the intensity of the cold rolled texture in the single β phase sample. Also, it was found that the presence of α precipitates changes the common annealing texture observed in the single β phase specimen.

scholarly journals Ultrafine grain recrystallisation of a metastable-β Ti-alloy via conventional thermomechanical processing

2020 ◽  
Vol 321 ◽  
pp. 12031
Author(s):  
A.J. Edwards ◽  
P. Vermaut ◽  
I. Guillot ◽  
F. Prima
Keyword(s):  
Cold Rolling ◽  
Thermomechanical Processing ◽  
Annealing Treatment ◽  
High Strength ◽  
Ultrafine Grain ◽  
Bulk Alloy ◽  
Ultrafine Grains ◽  
Conventional Furnace ◽  
Flash Annealing ◽  
Cold Rolling And Annealing

Alloys with ultrafine grains (UFG) offer high strength potentially combined with ductility. Until now, producing ultrafine grains in ingot alloys has required either severe plastic deformation techniques or flash annealing, neither of which are scalable to bulk alloy production. In this work, we formed submicronic grains in the metastable β titanium alloy Ti-20Nb-6Zr (at%), using conventional cold rolling and annealing at 823K in a conventional furnace. The cold rolling (298K) transformed the β structure mostly to α” martensite, but if the rolling temperature was raised to 453K, martensite formation was supressed, and no grain refinement occurred during the subsequent similar annealing treatment. Therefore, we attribute the formation of ultrafine grains to a mechanism involving stress-induced martensite and its reverse transformation.

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