Structural and Phase Transformations in Iron-Based Alloy Obtained in Conditions of High Cooling Rate Crystallization; AIP Conference Proceedings; Vol. 1783 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016

Structural and Phase Transformations in Iron-Based Alloy Obtained in Conditions of High Cooling Rate Crystallization; AIP Conference Proceedings; Vol. 1783 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016

Detalles Bibliográficos
Parent link:AIP Conference Proceedings
Vol. 1783 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016.— 2016.— [020108, 4 p.]
Autor principal: Kovalevskaya Zh. G. Zhanna Gennadievna
Autor Corporativo: Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра материаловедения и технологии металлов (МТМ)
Otros Autores: Khimich M. A.
Sumario:Title screen
The production of parts by selective electron beam melting (SEBM) is accompanied by the formation of nonequilibrium structures. This is caused by the crystallization of alloys with high cooling rates. To evaluate the influence of cooling rate on the process of structural and phase transformations in the Fe-8Si-5Al-2C alloy, the electron beam melting of plasma coating was carried out. The dendritic structure was formed in the molten pool. The distance between dendritic branches of the second order was 2-5 [mu]m. This corresponds to the cooling rate of about 103 K/s. The electron microscopy has shown that dendrites were formed by [alpha]-phase, while [gamma]-phase was localized between a-phase crystals in form of intercalations. The secondary phases (intermetallic, aluminum and iron carbosilicides, aluminates and iron carboaluminates) are of sub-micron size and located in the [alpha]- and [gamma]-phase boundary intersections or within the grains of the main phase. The microhardness of the alloy increases twofold. This suggests that complex hardening by solid-solution and dispersed hardening by the secondary phase particles occurs during crystallization with the abovementioned cooling rate.
Режим доступа: по договору с организацией-держателем ресурса
Lenguaje:inglés
Publicado: 2016
Materias:
электронный ресурс
труды учёных ТПУ
структурные превращения
фазовые превращения
сплавы
высокие скорости
охлаждение
кристаллизация
электронно-лучевая плавка
электронная микроскопия
микротвердость
Acceso en línea:http://dx.doi.org/10.1063/1.4966401
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=652692

Ejemplares similares

Ejemplares similares