Yu. A. Semerenko

Yu. A. Semerenko
B.Verkin Institute for Low Temperature Physics and Engineering · DEPARTMENT OF REAL CRYSTALS PHYSICS

PhD

About

81
Publications
4,051
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92
Citations
Education
September 1997 - September 2000

Publications

Publications (81)
Article
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Mechanical and acoustical properties of the new medium entropy alloy Co17.5Cr12.5Fe55Ni10Mo5 were studied for the first time in the low temperature range. It was shown that this alloy has a stable microstructure and rather high strength and plasticity. The high cryogenic strength of the investigated alloy, which is accompanied by a sufficiently hig...
Article
Full-text available
When studying the temperature dependences of the acoustic absorption and the modulus of elasticity, absorption peaks are often observed, which correspond to the characteristic step on the temperature dependence of the modulus of elasticity. Such features are called relaxation resonances. It is believed that the occurrence of such relaxation resonan...
Article
Full-text available
The dynamic elasticity and internal friction of the highly entropic Al0.5CoCrCuFeNi alloy were studied in a wide low temperature range of 4.2–300 K. In the experiments, the bending vibrations of thin plates at a frequency of 530 Hz were studied in two structural states: samples prepared after crystallizing a cast alloy (I); the same samples after p...
Conference Paper
Full-text available
Acoustical properties of the new medium entropy alloy Co17.5Cr12.5Fe55Ni10Mo5 were studied for the first time in the low temperature range.
Article
Full-text available
In the temperature range 4.2-350 K for the first time was studied the temperature dependence of the dynamic Young's modulus and acoustic absorption of the polyimide film PMA (Kapton). Two low-temperature relaxation processes on the temperature dependences of the acoustic properties of the PMDA / ODA polyimide are recorded: d-relaxation at 45 K and...
Preprint
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As a rule, modern programmable control devices as the main data transmission channel are equipped with GPIB (General Purpose Interface Bus) interface. Devices that meet the requirements of the hardware and software standard IEEE-488.2 can be connected to a personal computer (PC) using standard laptops and drivers of popular LabView or LabWindows to...
Presentation
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робота присвячена проблемі доцільного вибору методів чисельного моделювання елементів стабілізації та селекції частоти та засобів комп’ютерної реалізації цієї моделі
Preprint
Full-text available
In the temperature range 4.2-350 K for the first time was studied the temperature dependence of the dynamic Young's modulus and acoustic absorption of the polyimide film PMA (Kapton). Two low-temperature relaxation processes on the temperature dependences of the acoustic properties of the PMDA / ODA polyimide are recorded: d-relaxation at 45 K and...
Article
Full-text available
Разработан и апробирован комплексный подход к изучению механизмов низкотемпературной дисло- кационной релаксации при циклических низкотемпературных деформациях кристаллических материа- лов: совместное использование экспериментальных методов механической спектроскопии в широких частотно-температурных диапазонах и теоретических методов статистическог...
Article
Full-text available
An integrated approach to the study of the mechanisms of low-temperature dislocation relaxation during low-temperature cyclic deformations of crystalline materials has been developed and tested. The approach is based on the combined use of experimental methods of mechanical spectroscopy in wide frequency-temperature ranges and theoretical methods o...
Presentation
Full-text available
АКУСТИЧЕСКИЕ И РЕЗИСТИВНЫЕ СВОЙСТВА НОВЫХ АУСТЕНИТНЫХ СПЛАВОВ СИСТЕМЫ Fe-Cr-Mn В ИНТЕРВАЛЕ ТЕМПЕРАТУР 5÷325 К
Presentation
Full-text available
ИССЛЕДОВАНИЕ ФИЗИКО-МЕХАНИЧЕСКИХ СВОЙСТВ НОВОГО НАНОСТРУКТУРНОГО СУПЕРСПЛАВА INCONEL МА758 В ИНТЕРВАЛЕ ТЕМПЕРАТУР 4.2-310 К
Poster
Full-text available
АКУСТИЧЕСКИЕ СВОЙСТВА (МЕХАНИЧЕСКАЯ РЕЛАКСАЦИЯ) СИЛЬНОДЕФОРМИРОВАННОГО НАНОСТРУКТУРНОГО ТИТАНА ВТ1-0
Article
Full-text available
Mechanical and acoustical properties of the new Ni-based alloys 54.6Ni-11Fe-30Cr-3.5Nb-0.5Ti-0.4C and 58Ni-11Fe-30Cr-0.5Nb-0.5Ti were studied for the first time in temperature range 4.2-400 K. It was shown that this alloys has a stable microstructure and rather high strength and plasticity at temperature 4.2-400 K.
Conference Paper
Full-text available
In the temperature range 4.2-350 K for the first time was studied the temperature dependence of the dynamic Young's modulus and acoustic absorption of the polyimide film PMA (Kapton). Two low-temperature relaxation processes on the temperature dependences of the acoustic properties of the PMDA / ODA polyimide are recorded: d-relaxation at 45 K and...
Presentation
Full-text available
The aim of the project is, firstly, the creation of nanostructured high-entropy alloys (HEAs) FeCrCoNi and FeCrCoNiC with an improved strength-plasticity ratio due to carbon-doping and the effect on the plasticity of the induced twinning processes (TWIP – "Twinning Induced Plasticity") and phase transformation (TRIP – “Transformation Induced Plasti...
Conference Paper
Full-text available
In the temperature range 4.2-350 K for the first time was studied the temperature dependence of the dynamic Young's modulus and acoustic absorption of the polyimide film PMA (Kapton). Two low-temperature relaxation processes on the temperature dependences of the acoustic properties of the PMDA / ODA polyimide are recorded: d-relaxation at 45 K and...
Article
Full-text available
In the temperature range 0.5–300 K the mechanical properties and fracture characteristics of the highentropy alloy Al0.5CoCrCuFeNi were studied for different structural states (as cast and after two heat treatments). The temperature dependences of Young’s modulus for different structural states were measured by mechanical resonance spectroscopy. It...
Article
Full-text available
In the temperature range 0.5-300 K the mechanical properties and fracture characteristics of the high-entropy alloy Al0.5CoCrCuFeNi were studied for different structural states (as cast and after two heat treatments). The temperature dependences of Young's modulus for different structural states were measured by mechanical resonance spectroscopy. I...
Article
Full-text available
The method of statistical description of the dislocation component of the low-temperature internal friction in nanostructured material has been developed. The resonant interaction of elastic oscillations with thermally activated excitations of relaxators has been considered. It is shown that at low temperatures the peak shape and its localization o...
Article
Full-text available
The method of statistical description of the disloca-tion component of the low-temperature internal fric-tion in nanostructured material has been developed. The resonant interaction of elastic oscillations with thermally activated excitations of relaxators has been considered. It is shown that at low temperatures the peak shape and its localization...
Conference Paper
Full-text available
В области температур 4.2-350 К впервые изучены температурные зависимости динамического E D (T) и квазистатического E S (T) модулей Юнга, а также логарифмического декремента колебаний δ(T) промышленной полиимидной пленки марки ПМА (зарубежные аналоги Kapton HN, Apikal HN). ПМА изготавливается путем поликонденсации PMDA и ODA в сильных полярных раств...
Article
Full-text available
In the temperature range 0.5-300 K the mechanical properties and fracture characteristics of the high-entropy alloy Al0.5CoCrCuFeNi were studied for different structural states (as cast and after two heat treatments). The temperature dependences of Young's modulus for different structural states were measured by mechanical resonance spectroscopy. I...
Presentation
Full-text available
The acoustic properties of the new alloys (Inconel 52 and Inconel 52MSS) based on the system of NiCrFe first investigated in a wide temperature range 77-1200 K. It is found that in the Inconel 52 the behavior of high temperature background of acoustic ab-sorption is correlates with the temperature range of failure of the plasticity. It was experime...
Poster
Full-text available
The acoustic properties of the new alloys (Inconel 52 and Inconel 52MSS) based on the system of NiCrFe first investigated in a wide temperature range 77-1200 K. It is found that in the Inconel 52 the behavior of high temperature background of acoustic ab-sorption is correlates with the temperature range of failure of the plasticity. It was experime...
Conference Paper
Full-text available
In the temperature range 0.5-300 K the mechanical properties and fracture characteristics of the high-entropy alloy Al0.5CoCrCuFeNi were studied for different structural states (as cast and after two heat treatments). The temperature dependences of Young's modulus for different structural states were measured by mechanical resonance spectroscopy. I...
Conference Paper
Full-text available
The acoustic properties of the new alloys (Inconel 52 and Inconel 52MSS) based on the system of NiCrFe first investigated in a wide temperature range 77-1200 K. It is found that in the Inconel 52 the behavior of high temperature background of acoustic ab-sorption is correlates with the temperature range of failure of the plasticity. It was experime...
Poster
Full-text available
In the temperature range 0.5–300 K, the acoustic and mechanical properties of the high-entropy alloy Al0.5CoCrCuFeNi in the cast and annealed states were studied for the first time. The structure of the cast and annealed alloy Al0.5CoCrCuFeNi was studied by optical microscopy, X-ray diffraction analysis, scanning electron microscopy and X-ray micro...
Poster
Full-text available
The acoustic properties of the new alloys (Inconel 52 and Inconel 52MSS) based on the system of NiCrFe first investigated in a wide temperature range 77-1200 K. It is found that in the Inconel 52 the behavior of high temperature background of acoustic ab-sorption is correlates with the temperature range of failure of the plasticity. It was experime...
Article
Full-text available
The acoustic properties of the new alloys (Inconel 52 and Inconel 52MSS) based on the system of NiCrFe firstly investigated in a wide temperature range of 77-1200 K. As found in the Inconel 52, the behaviour of hightemperature background of acoustic absorption correlates with the temperature range of failure of the plasticity. As experimentally est...
Conference Paper
Full-text available
Новым перспективным направлением создания высокопрочных, термически стабильных металлических материалов является разработка многокомпонентных высокоэнтропийных сплавов (ВЭСов). Микроструктура таких сплавов часто состоит из одного или нескольких многокомпонентных твердых растворов замещения, что обеспечивает формирование привлекательного комплекса м...
Conference Paper
Full-text available
For the first time, the temperature dependences of the acoustic absorption and dynamic Young modulus of the Inconel 52 and Inconel 52 MSS alloys were studied by mechanical resonance spectroscopy.
Conference Paper
Full-text available
The acoustic and mechanical properties of the cast and annealed multicomponent high-entropy Al0.5CoCuCrNiFe alloy are studied.
Conference Paper
Full-text available
The structure and acoustic properties of the cast and annealed multi-component high-entropy alloy Al0.5CoCuCrNiFe are studied.
Conference Paper
Full-text available
In the temperature range 4.2-350 K for the first time was studied the temperature dependence of the quasi-static and dynamic Young's modulus of the polyimide film PMA (Kapton).
Conference Paper
Full-text available
The first time in the temperature range 4.2 – 300 K peculiarities of the plastic deformation of the nanocrystalline (NC) Pd - 9.8 at.% Au alloy produced by inert gas condensation method with an average grain size of about 14 nm have been studied. The flow stress σy has been found to increase by 4-5 times with decreasing the average grain size from...
Conference Paper
Full-text available
In the temperature range 5-325K, the temperature dependences of decrement, dynamic Young's modulus in a nanocryctalline Ti are investigated. Nanocrystalline bulk titanium of technical-grade purity with average grain-size 30÷50 nm has been obtained using a cryomechanical treatment method (an alternative method of intense plastic deformation). The g...
Article
Full-text available
In the temperature range 5-325 K the temperature dependences of decrement and dynamic Young's modulus in a nanocrystalline (grain size 30- 50 nm) and fine crystalline (grain size ~1 μm) Ti are investigated. Acoustic measurements were carried out by flexural vibration technique at frequencies 1.4-3.7 kHz. The grain size is determined using electron...
Article
Full-text available
Mechanical and acoustical properties of the new nanostructured Inconel MA758 alloy fabricated by mechanical alloying with disperse nanoparticles of yttrium oxide Y2O3 are studied for the first time within the temperature range 4.2-300 K. As shown, the Inconel MA758 superalloy has a stable microstructure and sufficiently high strength and plasticity...
Article
Full-text available
Dynamic spectroscopy methods based on the detection and analysis of the absorption peaks are convenient to obtain information about the physical mechanis ms of relaxation in solids. Analysis of thermally activated relaxation processes in real crystals is complicated by the presence of random local defects that lead to the statistical variation of r...
Conference Paper
Full-text available
Acoustical properties of the new nanostructured alloy INCONEL MA758 fabricated by the mechanical alloying with Y2O3 yttrium oxide disperse nanoparticles are studied for the first time in the temperature range 4.2—300 K.
Conference Paper
Full-text available
In the temperature range 4-430K the temperature dependences of decrement and dynamic Young's modulus in a nanocryctalline alloy Ni80Fe20 are investigated. Acoustic measurements were carried out by flexural vibration technique at frequency 0.4 kHz. The grain size (30-50 nm) was determined using electron microscopic technique. The effect of anneali...
Conference Paper
Full-text available
In the temperature range 5÷325 K, the temperature dependences of decrement, dynamic Young's modulus in a nanocryctalline Ti are investigated. Acoustic measurements were carried out by flexural vibration technique at frequencies 1.4÷3.7kHz. The grain size (30÷50 nm) was determined using electron microscopic technique. The effect of plastic deforming...
Article
Full-text available
Mechanical and acoustical properties of the new nanostructured alloy INCONEL MA758 fabricated by the mechanical alloying with Y2O3 yttrium oxide disperse nanoparticles are studied for the first time. As shown, the superalloy INCONEL MA758 has a stable microstructure and rather high strength and plasticity within the temperature range of 4.2—300 K i...
Presentation
Full-text available
ПЕРСПЕКТИВНЫМ НАПРАВЛЕНИЕМ создания малодефицитных дешевых высокопрочных при криогенных температурах и более легких нержавеющих сталей является использование аустенитной области системы Fe-Cr-Mn
Article
Full-text available
Within the temperature range 5-325 K, the temperature dependences of vibrations decrement, dynamic Young's modulus and electroresistivity of the stable austenitic Fe100-x-yCrxMny, alloy (x = 5-10%, y = 30-40%, N, C, S, P < 0,1%, Si < 0,3%) are investigated. This alloy offers promise for atomic industry, aerospace and cryogenic engineering.
Article
Full-text available
In the temperature range of 5 ÷ 300 K, the temperature dependences of acoustic absorption, dynamic Young's modulus, and specific electrical resistance of a stable austenitic alloy promising for cryogenic engineering have been studied.
Article
Full-text available
Temperature dependences of the acoustic absorption t and dynamic Young`s modulus in Cr single crystals and polycrystalline Cr in the vicinity of the magnetic phase transitions (TSF≈124 K, ТN≈309 К) were investigated at the vibration frequencies 1.5, 2.5, 4, 75, 88 kHz. The most interesting effect, that was not observed earlier, is a significant hys...
Article
Full-text available
A device for servicing a GPIB is described. The display registers of the LPT port are used, and, therefore, the GPIB interface is also capable of operating on old SPP-version cards.
Presentation
Full-text available
Перспективным направлением создания малодефицитных дешевых (содержание марганца в земной коре в 11 раз превышает содержание никеля; в настоящее время марганец дешевле хрома в 2.8, а никеля в 9.3 раза) высокопрочных при криогенных температурах и более легких (марганец в 1.2 раза легче никеля) нержавеющих сталей является использование аустенитной обл...
Article
Full-text available
A device for servicing a GPIB is described. The display registers of the LPT port are used, and, therefore, the GPIB interface is also capable of operating on old SPP-version cards.
Article
Full-text available
A simple device is described which allows simultaneous collection of information from a large number of parallel digital channels with the subsequent transfer of information to a PC via an LPT port. The device is intended for interfacing with a PC of several independently working digital measuring devices transmitting measurement results in a paral...
Article
Full-text available
A theory has been addvanced providiny an adequate description of thermal-activated relaxation resonances of various physical origins in defect-containing materials. The algorithm has been propoused for processing the temperature spectra of absorption and susceptibility defect to determin the relaxation process activation parameters.
Conference Paper
Full-text available
Известно, что акустическое поглощение и дефект модуля упругости реального кристалла с дефектами определяются статистическим усреднением дебаевских выражений по всему спектру энергий активации. Ранее было высказано предположение, что энергетический спектр акустической релаксации в монокристаллах Fe ориентации <731> может быть описан квазигауссовой ф...
Article
Full-text available
A study of influence of dislocation structure on parameters of the internal friction a-peak and the related Young's modulus defect registered in pure iron crystals and niobium single and polycrystals is carried out. A statistical interpretation of the temperature dependences and the structure sensitivity of the dynamic relaxation characteristics in...
Article
Full-text available
The temperature dependence of the logarithmic decrement delta and dynamic Young's modulus E in niobium single crystals of high purity is investigated in a wide interval of low temperatures 3 Kless than or equal toTless than or equal to300 K. Measurements are made by means of a two-component composite vibrator method under excitation of longitudinal...
Article
Full-text available
The temperature dependences of logarithmic decrement δ and dynamic Young's modulus E in high purity niobium single crystals are investigated in a wide low temperature range from 3 K to 300 K. The measurements are carried out using the two-component composite vibrator method with exciting longitudinal oscillations of a frequency about 88 kHz. A rela...
Poster
Full-text available
Методом двойного составного вибратора исследовано влияние пластической деформации, термоциклирования, низкотемпературного возврата [1], а также примесей [5] на параметры a-пика внутреннего трения в моно- и поликристаллах ниобия, зарегистрированного в области температур 200-250К. Предложено статистическое описание всей совокупности экспериментальны...
Poster
Full-text available
В интервале температур 3<T<300 К методом двойного составного вибратора (частота продольных колебаний @ 88кГц, амплитуда ультразвуковой деформации 5·10-9<e0<7·10-5) экспериментально изучено амплитудно-зависимое внутреннее трение в монокристаллах высокочистого ниобия. Изучались как недеформированные, так и деформированные четырехточечным изгибом при...
Conference Paper
Full-text available
The equilibrium state of a solids which is dis-turbed by external fields is spontaneously restor-ing, however this relaxation process lags behind the time of the change of the parameter describing this external effect. The duration of this process in the elementary cases is characterized by a relaxation time, and in more common case by set (spectru...
Article
Full-text available
Systematic study of properties of α-maximum in the iron single crystals is carried out. The experimental results are analyzed by using a statistical theory of thermally-activated relaxation resonance. The refined values of parameters of the elementary relaxation oscillators, responsible for this resonance, are obtained. It is shown that the cold pl...
Article
Full-text available
The pure iron crystals are studied to establish the influence of changes in sample dislocation structure on the pa-rameters of the low-temperature alfa-peak of internal friction and the related Young's modulus defect. A statistical inter-pretation of the temperature dependences and the structure sensitivity of the dynamic relaxation characteristics...
Conference Paper
Full-text available
It is known that the interaction of mechanical oscillations of a sufficiently perfect crystal with a system of thermally activated relaxators localized in its volume in the linear response approximation leads to the decrement of oscillations and the module defect of the Debye peak and “step” on the temperature dependences. It is shown that a change...
Conference Paper
Full-text available
При изучении температурной зависимости внутреннего трения в образцах ниобия различной чистоты и структурного совершенства в области температур 100-250 К неоднократно наблюдался пик акустического поглощения, имеющий свойства, типичные для alfa-пиков в ОЦК металлах. Методом двойного составного вибратора проведено исследование влияния примесей на пар...
Conference Paper
Full-text available
The effect of plastic deformation, thermal cycling, low-temperature return, as well as impurities on the parameters of the peak of internal friction in niobium monocrystals and polycrystals recorded in the temperature range 200 + 250 K was studied using the double composite vibrator method.
Conference Paper
Full-text available
Методом двойного составного вибратора (частота продольных колебаний 88кГц) экспериментально изучено нелинейное внутреннее трение в монокристаллах высокочистого ниобия. В интервале температур 3-300 К измерялись амплитудные зависимости декремента колебаний и динамического модуля Юнга.
Article
Full-text available
The influence of impurities on the parameters of the internal friction a-peak registered in Nb single and polycrystals in the temperature range 200-250 K at oscillation frequency »80 kHz is studied. It is found that an increase of the sample purity results in an increase of the peak location temperature, as well as in an increase of its width and a...
Conference Paper
Full-text available
На монокристаллах чистого железа в интервале температур 6-150 К экспериментально изучено влияние изменения дислокационной структуры образцов и частоты ультразвука на параметры низкотемпературного alfa-пика внутреннего трения и соответствующей ему "ступеньки" на температурной зависимости дефекта модуля Юнга.
Article
Full-text available
The influence of impurities on the parameters of the α peak of the internal friction in single-crystal and polycrystalline niobium is investigated; the internal friction is recorded in the temperature range 200–250 K at a vibrational frequency of 80 kHz. It is found that increasing the purity of the samples leads to an increase of the peak location...
Article
Full-text available
A theory was developed that made it possible to describe the change in the shape and parameters of the absorption peak and the temperature dependence of the modulus defect as a result of a statistical variation in the values of the activation energy of thermally activated relaxators.
Article
Full-text available
The pure iron single crystals are studied to establish the influence of changes in sample dislocation structure and ultrasonic frequency on the parameters of the low-temperature a-peak of internal friction and the related Young`s modulus defect. A statistical interpretation of the temperature dependences and the structure sensitivity of the dynamic...
Article
Full-text available
The effect of changes in the ultrasonic frequency or in the dislocation structure of the samples on the parameters of the low-temperature α peak of the internal friction and the Young’s modulus defect corresponding to it is investigated experimentally in single crystals of pure iron. A statistical interpretation of the temperature dependence and st...
Conference Paper
Full-text available
An influence of preliminary plastic deformation and low-temperature recovery on the amplitude, width and location temperature of the absorption peak in niobium polycrystals is investigated in the temperature range 80-300 K. The investigated samples had a resistivity ratio R300/R4.2=60 and initial dislocation density of order 105 cm-2. The measuremen...
Conference Paper
Full-text available
An influence of preliminary plastic deformation and low-temperature recovery on the amplitude, width and location temperature of the absorbtion peak in niobium polycrystals is investigated in the temperature range 80-300K. The measurement were carried out by the two-component oscillator technique at the frequencies of the torsional and longitudinal...
Article
Full-text available
The temperature dependences of the decrement of longitudinal vibrations at the frequencies of 78 and 363 kHz in polycrystalline niobium with the residual resistivity ratio RRR = 60 are investigated in a moderately low temperature range. A peak of internal friction located in the vicinity of 200 K is observed. The peak amplitude, width and location...
Article
Full-text available
Temperature dependences of the decrement of longitudinal vibrations are studied at moderately low temperatures in polycrystalline niobium with the residual resistivity ratio RRR = 60 at frequencies 78 and 363 kHz. A peak of internal friction is detected in the vicinity of 200 K. The height, width, and temperature of the peak change significantly up...

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