Nature of dynamic ferrite transformation revealed by in-situ neutron diffraction analysis during thermomechanical processing

2019 ◽  
Vol 165 ◽  
pp. 44-49 ◽  
Author(s):  
Akinobu Shibata ◽  
Yasunari Takeda ◽  
Nokeun Park ◽  
Lijia Zhao ◽  
Stefanus Harjo ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Analysis ◽  
Thermomechanical Processing ◽  
Neutron Diffraction Analysis ◽  
Ferrite Transformation ◽  
In Situ Neutron Diffraction

scholarly journals A Unique Quenching and Deformation Dilatometer for Combined In Situ Neutron Diffraction Analysis of Engineering Materials

2021 ◽  
Vol 23 (11) ◽  
pp. 2170046
Author(s):  
Xiaohu Li ◽  
Michael Hofmann ◽  
Martin Landesberger ◽  
Marius Reiberg ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Analysis ◽  
Neutron Diffraction Analysis ◽  
Engineering Materials ◽  
In Situ Neutron Diffraction

scholarly journals In situ neutron diffraction analysis of the influence of geometric confinement on crystalline swelling of montmorillonite

2006 ◽  
Vol 31 (1-2) ◽  
pp. 76-84 ◽  
Author(s):  
Karine Devineau ◽  
Isabelle Bihannic ◽  
Laurent Michot ◽  
Frédéric Villiéras ◽  
Farimah Masrouri ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Analysis ◽  
Neutron Diffraction Analysis ◽  
Crystalline Swelling ◽  
Geometric Confinement ◽  
In Situ Neutron Diffraction

scholarly journals In-situ Neutron Diffraction Analysis of Crystal Plasticity of Retained Austenite in Bearing Steel

2017 ◽  
Vol 207 ◽  
pp. 1958-1963 ◽  
Author(s):  
Vikram Bedekar ◽  
Rohit Voothaluru ◽  
Qingge Xie ◽  
Alexandru Stoica ◽  
R. Scott Hyde ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Analysis ◽  
Crystal Plasticity ◽  
Retained Austenite ◽  
Bearing Steel ◽  
Neutron Diffraction Analysis ◽  
In Situ Neutron Diffraction

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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