scholarly journals The effect of thermomechanical controlled processing on recrystallisation and subsequent deformation-induced ferrite transformation textures in microalloyed steels

2018 ◽  
Vol 53 (9) ◽  
pp. 6922-6938 ◽  
Author(s):  
P. Gong ◽  
Lin Sun ◽  
B. P. Wynne ◽  
E. J. Palmiere ◽  
W. M. Rainforth
Keyword(s):  
Microalloyed Steels ◽  
Controlled Processing ◽  
Ferrite Transformation ◽  
Subsequent Deformation ◽  
Deformation Induced Ferrite Transformation

Deformation Induced Ferrite Transformation in Microalloyed Steels: Theory and Application

2007 ◽  
Vol 561-565 ◽  
pp. 2491-2508 ◽  
Author(s):  
Yu Qing Weng ◽  
Xin Jun Sun ◽  
Han Dong
Keyword(s):  
Plain Carbon Steel ◽  
Carbon Steels ◽  
Microalloyed Steels ◽  
Low Carbon ◽  
Ferrite Transformation ◽  
Ultrafine Grained ◽  
The Common ◽  
Microalloying Elements ◽  
Deformation Induced Ferrite Transformation

Deformation Induced Ferrite Transformation (DIFT), i.e. transformation occurs during deformation applied in the temperatures above Ar3, has received wider attention since it has been proved to be a very effective way to produce ultrafine grained ferrite in low carbon steels. Although numerous works have been done on this topic in the past decade, the systematic works on DIFT in microalloyed steel, especially on the role of microalloying elements are still lacking compared with those in plain carbon steel. In this paper, the common features of DIFT will reviewed firstly, then an attempt will be made to elucidate the role of microalloying elements (niobium and vanadium) in DIFT, and the application of DIFT technology in microalloyed steels will be presented finally.

Temporal oscillatory behavior in deformation induced ferrite transformation in an Fe–C binary system

2004 ◽  
Vol 50 (6) ◽  
pp. 909-913 ◽  
Author(s):  
Mingming Tong ◽  
Jun Ni ◽  
Yutuo Zhang ◽  
Dianzhong Li ◽  
Yiyi Li
Keyword(s):  
Binary System ◽  
Oscillatory Behavior ◽  
Ferrite Transformation ◽  
Deformation Induced Ferrite Transformation

An integrated computer model with applications for austenite-to-ferrite transformation during hot deformation of Nb-microalloyed steels

2002 ◽  
Vol 33 (5) ◽  
pp. 1509-1520 ◽  
Author(s):  
Janusz Majta ◽  
Maciej Pietrzyk ◽  
Anna K. Zurek ◽  
Mark Cola ◽  
Pat Hochanadel
Keyword(s):  
Computer Model ◽  
Hot Deformation ◽  
Microalloyed Steels ◽  
Ferrite Transformation

In Situ Neutron Diffraction during Thermo-Mechanically Controlled Process in Low Alloy Steels

2006 ◽  
Vol 118 ◽  
pp. 419-424
Author(s):  
M.S. Koo ◽  
Ping Guang Xu ◽  
J.H. Li ◽  
Yo Tomota ◽  
O. Muransky ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Volume Fraction ◽  
Structural Evolution ◽  
Low Alloy Steels ◽  
Controlled Processing ◽  
Ferrite Transformation ◽  
Alloy Steels ◽  
Time Division ◽  
In Situ Neutron Diffraction

A challenge was made to examine the micro-structural evolution during thermomechanically controlled processing (TMCP) by in situ neutron diffraction. Since the neutron beam is too weak to achieve a time-division measurement to follow a rapid transformation in alow carbon steel, 2%Mn was added to make the austenite to ferrite transformation slower. Round bar specimens were heated up to 900°C with an electrical resistance method, then cooled down to 700°C, and compressed by 25% followed by step-by-step cooling. During the step-by-step cooling, neutron diffraction profiles were obtained and the volume fraction of ferrite, phase stresses and FWHM were analyzed. Using a similar TMCP simulator, specimens were quenched into water at several stages of the heat schedule to freeze the corresponding microstructures, which were observed with OM and SEM. As results, the ferrite volume fraction determined by neutron diffraction on cooling agrees well with that by microscopy. It is found that the austenite deformation and/or Nb addition accelerate the ferrite transformation to result in finer grain size.

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