Structure and thermophysical properties of aluminum-matrix composites

Пугачева, Н. Б.; Michurov, N. S.; Сенаева, Е. И.; Быкова, Т. М.

doi:10.1134/s0031918x16110119

Cited by 12 publications

(10 citation statements)

References 7 publications

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“…%: 5-7 Zn; 1,8-2,8 Mg; 1,4-2 Cu; до 0,5Fe; до 0,5 Si; 0,2-0,6 Mn; 0,1-0,25 Сr; до 0,05 Ni до 0,05 Ti. В качестве наполни-теля использованы частицы карбида кремния SiC, имеющие форму неправильных призм или пластин со средним размером 4 мкм [9]. Содержание SiC в композите составляет 30 об.…”

Section: материал и методика исследованийunclassified

“…Таким образом, каждая гранула матрицы находит-ся в окружении пористой малосвязной прослойки, состоящей из скоплений частиц SiC. Более подробно структурные особенности данного композита описаны в работе [9].…”

Section: материал и методика исследованийunclassified

“…На основании данных, полученных в работе [9], полагали, что между прослойкой наполнителя и гранулами алюминиевой матри-цы ММК существует идеальная адгезионная связь. В результате микрообъем ММК пред-ставляет собой куб с длиной ребра 150 мкм, состоящий из склеенных между собой однород-ных 3D областей, имитирующих структурные составляющие композита -ячейки структуры, заполненные материалом матрицы и карбидокремниевую прослойку с эффективными свой-ствами.…”

Section: рис 1 микроструктура исследуемого композита: м -гранулы маunclassified

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A computational model of V95/SiCp (7075/SiCp) aluminum matrix composite applied to stress-strain state simulation under tensile, compressive and shear loading conditions

Смирнов¹,

Konovalov²,

Myasnikova³

et al. 2017

DREAM

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Adhering to the structural-phenomenological approach, we develop a computational model of aluminum matrix composite deformation. The model allows us to simulate the stress-strain state parameters of the composite at the microscopic and macroscopic scales and in different loading scenarios. The composite is produced by sintering, and it has a cellular internal structure. The SiC reinforcing particles are grouped around sintered aluminum alloy pellets, forming a stratum. It has been experimentally established that, during the hot deformation process, the stratum undergoes structural changes. The changes influence the effective mechanical properties of the stratum. In order to account for these changes, we use the rule of mixtures, assuming the plastic flow properties of the stratum to be distributed proportionally to the volume fraction of its constituents. The model is used to simulate stress-strain state evolution at the microscopic and macroscopic scales in three loading scenarios -tension, compression and shear. We construct equivalent (von Mises) strain and average normal stress distribution fields in the finite-element nodes of the finite element mesh of a randomly selected micro volume and show that the local plastic deformation regions emerge in the composite structure. The presence of tensile stresses is also noted, which are the most adverse in terms of internal fracture probability.

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Section: материал и методика исследованийunclassified

Section: рис 1 микроструктура исследуемого композита: м -гранулы маunclassified

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A computational model of V95/SiCp (7075/SiCp) aluminum matrix composite applied to stress-strain state simulation under tensile, compressive and shear loading conditions

Смирнов¹,

Konovalov²,

Myasnikova³

et al. 2017

DREAM

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“…Метод кинетического микроиндентирования успешно применяется для определения механических свойств композитных материалов [19,20], различных покрытий, состав и свойства которых существенно отличаются от таковых для основ-ного металла [21-23], а также для материалов, поверхность которых подвергнута различным упрочняющим обработкам, в том числе, фрикционной обработке [24,25]. Полученные методом кинетического микроиндентирования характеристики используются при определении напряжен-но-деформированного состояния материала и прогнозирования развития процессов поврежденно-сти в условиях высоких нагрузок и напряжений [26][27][28].…”

Section: Introductionunclassified

Improving the strength of the AISI 321 austenitic stainless steel by frictional treatment

Savrai¹,

Makarov²,

Malygina³

et al. 2017

DREAM

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The influence of frictional treatment on the micromechanical characteristics, phase composition, residual stresses, surface roughness and damage of the AISI 321 austenitic stainless steel is investigated. The frictional treatment is performed with a hemispherical synthetic diamond indenter, loaded with 294 N, in a non-oxidizing argon medium, by varying the number of indenter strokes over the same part of the surface. It has been established that, to achieve substantial hardening, high quality and sufficient contact strength of the steel surface, it is expedient that, with the used process parameters, the frictional treatment of the AISI 321 steel be carried out with the number of double strokes not exceeding 14. Herewith, frictional treatment with 14 double strokes increases microhardness by a factor of 3.7, up to 730 HV0.025, while providing low surface roughness with Ra = 0.23 mm and highly increased ability of the surface to resist mechanical contact, this being supported by the data of kinetic microindentation. Lee H., Kim D., Jung J., Pyoun Y., Shin K. Influence of peening on corrosion properties of AISI 304 stainless steel. Corrosion Science, 2009, vol. 51, iss. 12, pp. 2826-2830. DOI: 10.1016/j.corsci.2009.008 3.Mordyuk B.N., Prokopenko G.I. Ultrasonic impact peening for the surface properties' management. Journal of Sound and Vibration, 2007, vol. 308, iss. 3-5, pp. 855-866. DOI: 10.1016/j.jsv.2007.03.054 4.Baraz V.P., Kartak B.P., Mineeva O.N. Special features of friction hardening of austenitic steel with unstable gamma-phase. Metal Science and Heat Treatment, 2011, vol. 52, iss. 9-10, pp. 473-475. DOI: 10.1007/s11041-010-9302-x 5.Hajian M., Abdollah-zadeh A., Rezaei-Nejad S.S., Assadi H., Hadavi S.M.M., Chung K., Shokouhimehr M. Improvement in cavitation erosion resistance of AISI 316L stainless steel by friction stir processing.

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“…The manufacturing process implies a cellular structure; namely, the reinforcement is concentrated around sintered aluminum alloy pellet boundaries ( Fig. 1) [9]. The matrix pellet size ranges from 20 to 70 μm.…”

Section: Introductionmentioning

confidence: 99%

Modeling the stress-strain state of the V95/SiC aluminum alloy matrix composite under uniaxial loading

Смирнов

Konovalov

Myasnikova

et al. 2017

AIP Conference Proceedings

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In the paper we develop a computational model of plastic deformation of an aluminum matrix composite. The composite is produced by sintering, and it has a cellular microstructure. SiC reinforcement particles form a stratum along the pellet boundaries of the V95 (analogous to 7075) aluminum alloy. The effective properties of the plastic flow of the stratum material are obtained by the rule of mixtures, depending on the volume fractions of the aluminum alloy and the reinforcement particles in the composite material. The feasibility of the model is demonstrated on the example of numerical simulation of the micro-and macroscopic stress-strain state of the composite under uniaxial tensile and compressive loading conditions.

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Structure and thermophysical properties of aluminum-matrix composites

Cited by 12 publications

References 7 publications

A computational model of V95/SiCp (7075/SiCp) aluminum matrix composite applied to stress-strain state simulation under tensile, compressive and shear loading conditions

A computational model of V95/SiCp (7075/SiCp) aluminum matrix composite applied to stress-strain state simulation under tensile, compressive and shear loading conditions

Improving the strength of the AISI 321 austenitic stainless steel by frictional treatment

Modeling the stress-strain state of the V95/SiC aluminum alloy matrix composite under uniaxial loading

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