Effect of Niobium on the Formation of Nano/Ultrafine Grain Structure in a Low Carbon Steel by Thermomechanical Treatment

2013 ◽  
pp. 63-70
Author(s):  
M. Abbasi ◽  
A. Kermanpur ◽  
A. Najafizadeh
2016 ◽  
Vol 61 (1) ◽  
pp. 15-18 ◽  
Author(s):  
I. M. Safarov ◽  
A. V. Korznikov ◽  
R. M. Galeyev ◽  
S. N. Sergeev ◽  
S. V. Gladkovsky ◽  
...  

1993 ◽  
Vol 21 (1) ◽  
pp. 3-16 ◽  
Author(s):  
P. Spalthoff ◽  
W. Wunnike ◽  
C. Nauer-Gerhard ◽  
H. J. Bunge ◽  
E. Schneider

The components of the elastic stiffness tensor of hot rolled low-carbon steel were determined using an ultrasonic pulse-echo-method. They were also calculated on the basis of X-ray texture measurements using the Hill approximation. The maximum deviation between experimental and calculated values is 3.5%. An influence of the slightly anisotropic grain structure on the elastic anisotropy could not be seen.


2014 ◽  
Vol 44 (5) ◽  
pp. 390-393 ◽  
Author(s):  
M. A. Polyakova ◽  
A. E. Gulin ◽  
O. A. Nikitenko ◽  
D. V. Konstantinov ◽  
M. S. Zherebtsov

JOM ◽  
1951 ◽  
Vol 3 (9) ◽  
pp. 721-726 ◽  
Author(s):  
R. L. Solter ◽  
C. W. Beattie

2008 ◽  
Vol 22 (18n19) ◽  
pp. 2804-2813
Author(s):  
Y. ADACHI ◽  
M. WAKITA ◽  
H. BELADI ◽  
P. D. HODGSON

A novel approach was used to produce an ultrafine grain structure in low carbon steels with a wide range of hardenability. This included warm deformation of supercooled austenite followed by reheating in the austenite region and cooling (RHA). The ultrafine ferrite structure was independent of steel composition. However, the mechanism of ferrite refinement changed with the steel quench hardenability. In a relatively low hardenable steel, the ultrafine structure was produced through dynamic strain induced transformation, whereas the ferrite refinement was formed by static transformation in steels with high quench hardenability. The use of a model Ni -30 Fe austenitic alloy revealed that the deformation temperature has a strong effect on the nature of the intragranular defects. There was a transition temperature below which the cell dislocation structure changed to laminar microbands. It appears that the extreme refinement of ferrite is due to the formation of extensive high angle intragranular defects at these low deformation temperature that then act as sites for static transformation.


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