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Strength properties and structure of a submicrocrystalline Al-Mg-Mn alloy under shock compressionстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 декабря 2017 г.
- Авторы: Petrova A.N., Brodova I.G., Razorenov S.V.
- Журнал: Physics of Metals and Metallography
- Том: 118
- Номер: 6
- Год издания: 2017
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 601
- Последняя страница: 607
- DOI: 10.1134/S0031918X17060072
- Аннотация: The results of studying the strength of a submicrocrystalline aluminum A5083 alloy (chemical composition was 4.4Mg-0.6Mn-0.11Si-0.23Fe-0.03Cr-0.02Cu-0.06Ti wt % and Al base) under shockwave compression are presented. The submicrocrystalline structure of the alloy was produced in the process of dynamic channel-angular pressing at a strain rate of 10(4) s(-1). The average size of crystallites in the alloy was 180-460 nm. Hugoniot elastic limit sigma(HEL), dynamic yield stress sigma(y), and the spall strength sigma(SP) of the submicrocrystalline alloy were determined based on the free-surface velocity profiles of samples during shock compression. It has been established that upon shock compression, the sigma(HEL) and sigma(y) of the submicrocrystalline alloy are higher than those of the coarse-grained alloy and sigma(sp) does not depend on the grain size. The maximum value of sigma(HEL) reached for the submicrocrystalline alloy is 0.66 GPa, which is greater than that in the coarse-crystalline alloy by 78%. The dynamic yield stress is sigma(y) = 0.31 GPa, which is higher than that of the coarse-crystalline alloy by 63%. The spall strength is sigma(sp) = 1.49 GPa. The evolution of the submicrocrystalline structure of the alloy during shock compression was studied. It has been established that a mixed nonequilibrium grain-subgrain structure with a fragment size of about 400 nm is retained after shock compression, and the dislocation density and the hardness of the alloy are increased.
- Добавил в систему: Разоренов Сергей Владимирович