Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 3. Отображено 3.
11-07-2023 дата публикации

Molecular dynamics simulation method for nucleation and growth of pores at grain boundary in martensitic steel creep process

Номер: CN116417099A
Автор: DONG ZHIBO, LI QINGHUA, YANG LAISHAN, ZHANG ZHIHANG, HAN FANG, LI CHENGKUN, WANG HAN
Принадлежит:

Along with the improvement of science and technology, martensitic stainless steel mechanical devices are more and more applied to high-temperature environments, so that creep failure often occurs in the long-time service process. The typical phenomenon of creep failure is nucleation and growth of creep holes. The invention discloses a molecular dynamics simulation method for nucleation and growth of holes at a grain boundary in a martensitic steel creep process. The method specifically comprises the following steps: (1) establishing a molecular dynamics simulation model; (2) system relaxation; (3) selecting a potential function; (4) selecting boundary conditions; (5) temperature and pressure control; and (6) visualization and data analysis. Through numerical simulation of the nucleation and growth process of the pores at the grain boundary in the creep process of martensitic steel at different environment temperatures, the influence mechanism of the angle and number of the grain boundary ...

Подробнее
Номер записи: 1
07-04-2023 дата публикации

GH3230 alloy powder, preparation method of GH3230 alloy powder and preparation method of laser powder bed molten GH3230 alloy component

Номер: CN115927916A
Автор: LIN DANYANG, XI XIN, LI ZIHAN, MA RUI, SONG XIAOGUO, SHI ZHIFENG, HU JIXU, TAN CAIWANG, DONG ZHIBO
Принадлежит:

The invention relates to GH3230 alloy powder, a preparation method of the GH3230 alloy powder and a preparation method of a laser powder bed melting GH3230 alloy component, and belongs to the technical field of high-temperature alloy. In order to solve the problem that the performance of a laser powder bed melting GH3230 alloy component for a combustion chamber serving at the temperature of 1000 DEG C or above is affected by cracks, GH3230 alloy powder is prepared through gas atomization and is used for preparing the laser powder bed melting GH3230 alloy component. According to the method, the element content change is reasonably controlled within the standard GH3230 alloy component range, so that the inherent performance of the GH3230 alloy does not change, but the grain growth direction of the deposited GH3230 alloy is changed, the texture strength is reduced, the grain boundary residual strain is relieved, the solidification temperature interval of the laser powder bed molten GH3230 ...

Подробнее
Номер записи: 2
18-08-2023 дата публикации

Molecular dynamics modeling method for simulating martensite phase transformation in steel structure containing nano holes

Номер: CN116611204A
Автор: DONG ZHIBO, LI QINGHUA, YANG LAISHAN, ZHANG ZHIHANG, HAN FANG, LI CHENGKUN, WANG HAN
Принадлежит:

Nanoscale holes are often formed in a martensitic steel structure manufactured based on a selective laser melting method additive material. The invention discloses an atomic-scale simulation method for a martensite phase transformation process in a steel structure containing nano-pores. The atomic-scale simulation method specifically comprises the following steps: (1) establishing a molecular dynamics simulation model; (2) system relaxation; (3) selecting a potential function; (4) selecting boundary conditions; (5) temperature and pressure control; and (6) visualization and data analysis. According to the method, the influence mechanism of the holes in the structure on the martensite phase transformation is disclosed from the angles of energy change and atomic shear mechanism by investigating the sizes of different holes and by virtue of visualization and data processing software. The method has important significance for regulating and controlling the martensite content in the structure ...

Подробнее
Номер записи: 3