Free energy of the high-Tc two-band superconductor and the temperature dependence of gaps in the phase transition region

1992 ◽  
Vol 191 (3-4) ◽  
pp. 469-476 ◽  
Author(s):  
P. Konsin ◽  
T. Örd
Keyword(s):  
Phase Transition ◽  
Free Energy ◽  
Temperature Dependence ◽  
Transition Region ◽  
High Tc ◽  
Phase Transition Region

scholarly journals Effects of deformation on the microstructure of a Ti-V microalloyed steel in the phase transition region

2004 ◽  
Vol 57 (4) ◽  
pp. 303-311
Author(s):  
Wiliam Regone ◽  
Sérgio Tonini Button
Keyword(s):  
Phase Transition ◽  
Phase Transformation ◽  
Transition Region ◽  
Microstructural Evolution ◽  
Microalloyed Steel ◽  
Hot Forging ◽  
Microalloyed Steels ◽  
Air Cooling ◽  
Water Cooling ◽  
Phase Transition Region

Microalloyed steels are used in the forging of many automotive parts like crankshafts and connecting rods. They are hot worked in a sequence of stages that includes the heating to the soaking temperature, followed by forging steps, and finally the controlled cooling to define the microstructure and mechanical properties. In this work it was investigated the thermomechanical behavior and the microstructural evolution of a Ti-V microalloyed steel in the phase transition region. Torsion tests were done with multiple steps with true strain equal to 0.26 in each step. After each torsion step the samples were continuous cooled for 15 seconds to simulate hot forging conditions. These tests provided results for the temperature at the beginning of the phase transformation, and allowed to analyze the microstructural changes. Also, workability tests were held to analyze the microstructural evolution by optical and scanning electron microscopy. Results from the torsion tests showed that the temperature for the beginning of phase transformation is about 700 ºC. Workability tests held at 700 ºC followed by water-cooling presented microstructures with different regions: strain hardened, and static and dynamic recrystallized. Workability tests at 700 ºC followed by air-cooling showed a complex microstructure with ferrite, bainite and martensite, while tests at 650 and 600 ºC followed by water-cooling showed a microstructure with allotriomorphic ferrite present in the grain boundaries of the previous austenite.

Diffraction of a Plane Electromagnetic Wave by a VO2 Microsphere in the Phase Transition Region

2020 ◽  
Vol 62 (6) ◽  
pp. 993-997
Author(s):  
I. V. Bychkov ◽  
D. A. Kuzmin ◽  
V. A. Tolkachev ◽  
A. P. Kamantsev ◽  
V. V. Koledov ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electromagnetic Wave ◽  
Transition Region ◽  
Plane Electromagnetic Wave ◽  
Phase Transition Region

Magnetic permeability dispersion in CdCr2Se4in the phase transition region

1985 ◽  
Vol 5 (1) ◽  
pp. 55-66
Author(s):  
J. Jelonek ◽  
M. Szczygielski
Keyword(s):  
Phase Transition ◽  
Transition Region ◽  
Magnetic Permeability ◽  
Phase Transition Region

Origin of ferroelectric phase transition in SbSClxI1-x mixed crystals

2014 ◽  
Vol 28 (30) ◽  
pp. 1450209 ◽  
Author(s):  
A. Audzijonis ◽  
L. Žigas ◽  
R. Sereika ◽  
R. Žaltauskas
Keyword(s):  
Phase Transition ◽  
Free Energy ◽  
Temperature Dependence ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Harmonic Approximation ◽  
Temperature Dependent ◽  
Normal Coordinate ◽  
Unit Cell Parameters ◽  
Cell Parameters

The measurements of SbSCl x I 1-x(x = 0.2) temperature dependent capacitance were carried out. The temperature of ferroelectric phase transition TC ≈340 K was measured experimentally. TC of SbSCl x I 1-x was calculated theoretically in anharmonic and harmonic approximations. TC was calculated in anharmonic approximation using temperature dependence of mean potential energy of Sb atoms as a function of the soft B1u symmetry normal coordinate along c(z)-axis. Moreover, TC was calculated in harmonic approximation using temperature dependence of vibrational thermodynamic functions (Helmholc free energy). TC dependence from unit cell parameters a, b and from mixture composition x was carried out.

Ab Initio Study on Continuous Evolution of Mechanical Properties in Phase‐Transition Region of Low‐Carbon Steel

2020 ◽  
Vol 91 (8) ◽  
pp. 2000070
Author(s):  
Songyuan Ai ◽  
Mujun Long ◽  
Wei Guo ◽  
Peng Liu ◽  
Dengfu Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Transition ◽  
Carbon Steel ◽  
Ab Initio ◽  
Transition Region ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ab Initio Study ◽  
Continuous Evolution ◽  
Phase Transition Region

Polarization echo in ferroelectric phase transition region

1978 ◽  
Vol 22 (1) ◽  
pp. 755-757
Author(s):  
V. S. Romanov ◽  
V. I. Bashkov ◽  
V. M. Berezov ◽  
V. D. Korepanov
Keyword(s):  
Phase Transition ◽  
Transition Region ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Phase Transition Region

Photoluminescence measurements in the phase transition region for CdS thin films

1996 ◽  
Vol 14 (4) ◽  
pp. 2480-2482 ◽  
Author(s):  
H. Ariza‐Calderon ◽  
R. Lozada‐Morales ◽  
O. Zelaya‐Angel ◽  
J. G. Mendoza‐Alvarez ◽  
L. Baños
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Transition Region ◽  
Cds Thin Films ◽  
Phase Transition Region
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