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Surface Treatment Effect on Bulk Magnetoelastic Properties of High Damping Fe-Based Alloys

100%
Chudakov I., Udovenko V.
Acta Physica Polonica A
|
1996
|
vol. 89
|
issue 3
425-430
EN
Binary and complex alloyed high damping steels on the base of Fe-Cr and Fe-Al systems was investigated. It was shown that already slight surface treatment leads to the increase in magnetic anisotropy of the material and to the decrease in damping capacity.
2
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Structural Mechanism of the High-Damping State Formation in the Fe-Mn-Si Shape Memory Alloys

81%
Udovenko V., Polyakova N., Turmambekov T.
Acta Physica Polonica A
|
1999
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vol. 96
|
issue 2
307-310
EN
The structural mechanism of the high-damping state formation in the Fe-Mn-Si alloys has been investigated using transition electron microscopy and logarithmic decrement measurements. The high level of the elastic energy dissipation was found to be connected with a reversible movement of the Shockley dislocations under the sign changing stress action. The Shockley dislocations density and mobility are controlled by the alloys compositions and prior deformation value. The increase in the dislocations density with the help of the special cycling treatments can improve the alloys damping capacity.
3
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Application of Neutron Refraction for Characterization and Optimization of High-Damping Iron-Based Alloys

71%
Udovenko V., Polyakova N., Chudakov I., Milczarek J., Mikke K.
Acta Physica Polonica A
|
1999
|
vol. 96
|
issue 2
303-306
EN
High-damping alloys with the magnetomechanical damping mechanism, based on the Fe-Cr system, have been studied. It has been shown that the direct investigation of the magnetic domain structure in the bulk materials using the neutron refraction method allows one to obtain important quantitative information concerning the formation of the high-damping state. The dependence of the damping capacity on the average magnetic domain size was found to possess a sharp maximum, thus revealing a range of the optimal domain sizes. The results obtained are important for the development of the technology of high-damping materials.
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