Ultralow-temperature superplasticity and its novel mechanism in ultrafine-grained Al alloys

Autor:	Nguyen Q. Chinh, Maxim Yu Murashkin, Elena V. Bobruk, János L. Lábár, Jenő Gubicza, Zsolt Kovács, Anwar Q. Ahmed, Verena Maier-Kiener, Ruslan Z. Valiev
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	ultralow-temperature superplasticity aluminum alloys ultrafine-grained materials severe plastic deformation high-pressure torsion Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 9, Iss 11, Pp 475-482 (2021)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2021.1976293
Popis:	The important benefits of ultrafine-grained (UFG) alloys for various applications stem from their enhanced superplastic properties. However, decreasing the temperature of superplasticity and providing superplastic forming at lower temperatures and higher strain rates is still a priority. Here, we disclose, for the first time, the mechanism by which grain boundary sliding and rotation are enhanced, when UFG materials have grain boundary segregation of specific alloying elements. Such an approach enables achieving superplasticity in commercial Al alloys at ultralow homologous temperatures below 0.5 (i.e. below 200°C), which is important for developing new efficient technologies for manufacturing complex-shaped metallic parts with enhanced service properties.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ed313bc533c94965a19846759eab24cb Zobrazit plný text záznamu View record in DOAJ