Effect of pulsed magnetic fields on deformation mechanisms for metals at low temperatures

1986 ◽  
Vol 18 (4) ◽  
pp. 464-467
Author(s):  
E. V. Vorob'ev
Keyword(s):  
Magnetic Fields ◽  
Low Temperatures ◽  
Deformation Mechanisms ◽  
Pulsed Magnetic Fields

scholarly journals Martensitic transformation in the systems based on Fe-Ni compositions in strong pulsed magnetic fields

2021 ◽  
pp. 22-29 ◽  
Author(s):  
I. Zolotarevskii
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Magnetic Fields ◽  
Temperature Dependence ◽  
Strong Magnetic Field ◽  
Low Temperatures ◽  
Strong Dependence ◽  
Magnetic Interaction ◽  
Iron Alloys ◽  
Pulsed Magnetic Fields

Purpose of work. To ascertain the causes of the abnormally large displacement of the martensitic point in steels and iron alloys in strong pulsed magnetic fields at low temperatures. Research methods. Generalization of experimental and theoretical investigations of the strong magnetic field influence on the martensitic transformation in steels and iron alloys, taking into account the magnetic state of austenite. The obtained results. The distributions of the martensitic point displacement ΔMS from the content of the main component - iron and the temperature of the martensitic γ → α- transformation beginning (martensitic point MS) in different experiments are obtained. It is shown that the obtained temperature dependence ΔMS(MS) in a strong magnetic field at low temperatures decomposes into two components, one of which correlates with the generalized Clapeyron-Clausius equations, and the other is opposite to it. In addition, it was found that steels and alloys with intense γ → α- transformation in a magnetic field contain at least 72.5% iron (wt), which at low temperatures in the fcc structure is antiferromagnetic. Scientific novelty. The anomalous temperature dependence of the distribution ΔMS(MS) in a strong magnetic field is explained on the basis of quantum representations of the magnetic interaction of atoms in the Fe-Ni system. This effect is associated with a number of other invar effects, in particular, with an abnormally large spontaneous and forced magnetostriction, a strong dependence of the resulting exchange integral on the interatomic distance. The point of view according to which in these alloys in a magnetic field γ → α- transformation occurs by the type of “magnetic first kind phase transformation” is substantiated. It is assumed that the nucleation of the martensitic phase in a magnetic field occurs in (at) local regions of γ- phase with disoriented atomic magnetic moments (with high compression and increased forced magnetostriction). Practical value. The information obtained in this work provides grounds for explaining the kinetic features of the transformation of austenite into martensite in steels and iron alloys.

Magnetic phase transitions by strong, pulsed magnetic fields at low temperatures in CuxZn1−xCr2Se4

1981 ◽  
Vol 2 (1) ◽  
pp. 67-73 ◽  
Author(s):  
S. Juszczyk ◽  
J. Krok ◽  
I. Okońska-Kozłowska ◽  
H. Broda ◽  
J. Warczewski ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Fields ◽  
Low Temperatures ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Pulsed Magnetic Fields

An apparatus for studying semi-metals in pulsed magnetic fields up to 900 kOe at low temperatures

Cryogenics ◽  
1974 ◽  
Vol 14 (11) ◽  
pp. 620-622
Author(s):  
N.B. Brandt ◽  
V.G. Karavaev ◽  
E.A. Svistova ◽  
I.E. Yarambash
Keyword(s):  
Magnetic Fields ◽  
Low Temperatures ◽  
Pulsed Magnetic Fields

Strong pulsed magnetic fields combined with very low temperatures

1992 ◽  
Vol 177 (1-4) ◽  
pp. 63-70 ◽  
Author(s):  
Fritz Herlach ◽  
M. van der Burgt ◽  
I. Deckers ◽  
G. Heremans ◽  
G. Pitsi ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Low Temperatures ◽  
Pulsed Magnetic Fields

Applications of pulsed magnetic fields and low temperatures to low-dimensional (organic) conductor physics

1996 ◽  
Vol 216 (3-4) ◽  
pp. 380-383 ◽  
Author(s):  
J.S. Brooks ◽  
R.G. Clark ◽  
R.P. Starrett ◽  
R. Newbury ◽  
R.H. McKenzie ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Low Temperatures ◽  
Organic Conductor ◽  
Pulsed Magnetic Fields ◽  
Low Dimensional

scholarly journals High-field Study of Layered Manganites R1/2Sr3/2MnO4 (R = La and Nd)

1999 ◽  
Vol 52 (2) ◽  
pp. 227
Author(s):  
M. Tokunaga ◽  
N. Miura ◽  
Y. Moritomo
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Field Study ◽  
Transport Properties ◽  
Low Temperatures ◽  
High Field ◽  
Colossal Magnetoresistance ◽  
Real Space ◽  
Charge Ordering ◽  
Pulsed Magnetic Fields

We have studied the effects of a magnetic field on the magnetism and transport properties of the layered manganites R1/2Sr3/2MnO4 (R = La and Nd) in pulsed magnetic fields up to 40 T. The R = La crystal shows metamagnetic-like transitions above 30 T, concomitantly with a colossal magnetoresistance (CMR) effect as large as [ρ(0) - ρ(H)]/ρ(H) > 103 with a field of µοH = 38 T at low temperatures. These transitions can be ascribed to the field-induced melting of the real-space ordering of the eg electrons (charge ordering). For the R = Nd crystal, a magnetic field along the c-axis enhances the two-dimensionality in the conductivity. Moreover, we observed metamagnetic-like transitions accompanied by the CMR effects at low temperatures, in spite of the absence of charge ordering.

Single crystal neutron diffraction studies of antiferromagnets at low temperatures in applied magnetic fields

1959 ◽  
Vol 20 (2-3) ◽  
pp. 180-184 ◽  
Author(s):  
W.C. Koehler ◽  
M. K. Wilkinson ◽  
J.W. Cable ◽  
E.O. Wollan
Keyword(s):  
Magnetic Fields ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Low Temperatures

Early Development of Sea Urchin P.lividus Under Static (6 mT) and Pulsed Magnetic Fields (15 and 72 Hz)

2016 ◽  
Vol 10 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Bernadetta A. Tenuzzo ◽  
Cristian Vergallo ◽  
Luciana Dini
Keyword(s):  
Magnetic Fields ◽  
Early Development ◽  
Sea Urchin ◽  
Pulsed Magnetic Fields
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