Ultralow-temperature superplasticity and its novel mechanism in ultrafine-grained Al alloys
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In: Materials Research Letters [Elektronische Ressource], Vol. 9.2021, No. 11, 15.09.2021, p. 475-482.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Ultralow-temperature superplasticity and its novel mechanism in ultrafine-grained Al alloys
AU - Chinh, Nguyen Q.
AU - Murashkin, Maxim Yu
AU - Bobruk, Elena V.
AU - Lábár, János L.
AU - Gubicza, Jenö
AU - Kovács, Zsolt
AU - Ahmed, Anwar Q.
AU - Maier-Kiener, Verena
AU - Valiev, Ruslan Z.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - 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.For the first time, ultralow-temperature superplasticity is found in commercial 7xxx Al alloy. This discovery enables the development of new technologies for the superplastic forming of complex-shaped products with enhanced service properties.
AB - 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.For the first time, ultralow-temperature superplasticity is found in commercial 7xxx Al alloy. This discovery enables the development of new technologies for the superplastic forming of complex-shaped products with enhanced service properties.
U2 - 10.1080/21663831.2021.1976293
DO - 10.1080/21663831.2021.1976293
M3 - Article
VL - 9.2021
SP - 475
EP - 482
JO - Materials Research Letters [Elektronische Ressource]
JF - Materials Research Letters [Elektronische Ressource]
SN - 2166-3831
IS - 11
ER -
