Modifying structure and properties of nickel alloys by nanostructured composite powders; Thermophysics and Aeromechanics; Vol. 22, iss. 1

Modifying structure and properties of nickel alloys by nanostructured composite powders; Thermophysics and Aeromechanics; Vol. 22, iss. 1

Detalhes bibliográficos
Parent link:Thermophysics and Aeromechanics: Scientific Journal.— , 1994-
Vol. 22, iss. 1.— 2015.— [P. 127-132]
Autor Corporativo: Национальный исследовательский Томский политехнический университет (ТПУ) Юргинский технологический институт (филиал) (ЮТИ) Кафедра технологии машиностроения (ТМС)
Outros Autores: Cherepanov A. N. Anatoly Nikolaevich, Ovcharenko V. E. Vladimir Efimovich, Liu G., Cao L.
Resumo:Title screen
The article presents the results of an experimental study of the influence of powder nanomodifiers of refractorycompounds on the mechanical properties, macro- and microstructure of heat-resistant alloys ZhS-6K and Inconel 718.It is shown that the introduction of nanomodifiers into the melt leads to the refinement of the alloy structure: the averagegrain size decreases 1.5–2 times, and their morphology becomes similar to equiaxial at significant reductionof the particle size in the carbide phase. The service life of ZhS-6K alloy under cyclic loading at 600°C increases 2.7times, and at 975 °C by 40 %, and relative elongation increases more than twice. The mechanical properties of Inconel718 significantly increase: long-term strength at 650 °С increases 1.5–2 times, and the number of cycles beforethe collapse at 482 °С grows more than three times. It has been found out that addition of nanomodifiers to the melt,in alloys, forms clusters of particles of refractory compounds at borders and joints of the formed grain structure thatmay help slowing down the processes of recrystallization (prevents the increase in the size of the contacting grains bytheir associations) and stabilizes the strength properties of the alloys at higher temperatures.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglês
Publicado em: 2015
Assuntos:
электронный ресурс
труды учёных ТПУ
жаропрочные сплавы
нанопорошки
карбидные фазы
интерметаллиды
теплостойкость
Acesso em linha:http://dx.doi.org/10.1134/S0869864314010114
Formato: Recurso Electrónico Capítulo de Livro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=644023

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