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Циклическая стабильность двустороннего эффекта памяти формы в закаленных [001]-монокристаллах Co35Ni35Al30

Циклическая стабильность двустороннего эффекта памяти формы в закаленных [001]-монокристаллах Co35Ni35Al30

Abstract

It was shown experimentally that quenched [001]-oriented Co35Ni35Al30 single crystals demonstrate the two-way shape memory effect with the reversible strain of |εTWSME| = (3.1 ± 0.3) % after preliminary training procedure in the isothermal conditions: 100 cycles of loading/unloading at room temperature T = 295 K with the maximum reversible strain of 6 %. The physical cause of the two-way shape memory effect is strain hardening near the particles of γ-phase. It leads to the growth of oriented martensite during the cooling/heating cycles without external loading. The degradation of the two-way shape memory effect characteristics by internal stress relaxation at the interphase of g-phase and B 2-matrix with increase of the thermal cycle numbers was founded.

Экспериментально показано, что после предварительной термомеханической тренировки в изотермических условиях: 100 циклов нагрузка/разгрузка при температуре Т = 295 К с максимальной обратимой деформацией 6 % закаленные [001]-монокристаллы Co35Ni35Al30 демонстрируют двусторонний эффект памяти формы с величиной обратимой деформации |εДЭПФ| = (3,1 ± 0,3) %. Физической причиной появления этого эффекта является деформационный наклеп вблизи частиц g-фазы, что приводит к росту ориентированного мартенсита в циклах охлаждение/нагрев в свободном состоянии. С увеличением числа термоциклов обнаружена деградация функциональных характеристик двустороннего эффекта памяти формы, вызванная релаксацией внутренних напряжений на границе раздела g-фазы и B 2-матрицы.

Keywords

ТЕРМОУПРУГИЕ МАРТЕНСИТНЫЕ ПРЕВРАЩЕНИЯ,ДВУСТОРОННИЙ ЭФФЕКТ ПАМЯТИ ФОРМЫ,ЦИКЛИЧЕСКАЯ СТАБИЛЬНОСТЬ,СВЕРХЭЛАСТИЧНОСТЬ,THERMOELASTIC MARTENSITIC TRANSFORMATION,TWO-WAY SHAPE MEMORY EFFECT,CYCLIC STABILITY,SUPERELASTICITY

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze