Research output: Contribution to journal › Conference article › peer-review
Low Temperature Superplasticity of High-Strength Ultrafine-Grained Al 7050 alloy. / Bobruk, E. V.; Murashkin, M. Yu; Lomakin, I. V.; Kazykhanov, V. U.; Valiev, R. Z.
In: IOP Conference Series: Materials Science and Engineering, Vol. 461, No. 1, 012090, 10.12.2018.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Low Temperature Superplasticity of High-Strength Ultrafine-Grained Al 7050 alloy
AU - Bobruk, E. V.
AU - Murashkin, M. Yu
AU - Lomakin, I. V.
AU - Kazykhanov, V. U.
AU - Valiev, R. Z.
N1 - Funding Information: The authors gratefully acknowledge the financial support through the Ministry of Science and Higher Education of the Russian Federation under grant agreement No. 14.586.21.0061 (unique project identifier RFMEFI58618X0061). Publisher Copyright: © Published under licence by IOP Publishing Ltd. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/12/10
Y1 - 2018/12/10
N2 - Ultrafine-grained (UFG) Al 7050 alloy of the 7xxx series demonstrates very high strength at room temperature with UTS=845 MPa and hardness Hv=255, which considerably exceeds the value after conventional heat treatment T73, i.e. Hv=165. It is also revealed that with increasing temperature the alloy exhibits rather high ductility with elongation to failure δ=170% at 120 °C and strain rate of 5×104 s-1 and typical superplastic behavior with δ=480% and δ=690% at temperatures 170 °C and 200 °C correspondingly. Such values of superplasticity (SP) temperature are considerably lower than that typical of this alloy with micron-sized grains (TSP=450-500 °C). Such reduction in superplasticity temperature made it possible to preserve ultrafine grains in the alloy structure and provide its high-strength state after SP straining.
AB - Ultrafine-grained (UFG) Al 7050 alloy of the 7xxx series demonstrates very high strength at room temperature with UTS=845 MPa and hardness Hv=255, which considerably exceeds the value after conventional heat treatment T73, i.e. Hv=165. It is also revealed that with increasing temperature the alloy exhibits rather high ductility with elongation to failure δ=170% at 120 °C and strain rate of 5×104 s-1 and typical superplastic behavior with δ=480% and δ=690% at temperatures 170 °C and 200 °C correspondingly. Such values of superplasticity (SP) temperature are considerably lower than that typical of this alloy with micron-sized grains (TSP=450-500 °C). Such reduction in superplasticity temperature made it possible to preserve ultrafine grains in the alloy structure and provide its high-strength state after SP straining.
UR - http://www.scopus.com/inward/record.url?scp=85059386358&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/461/1/012090
DO - 10.1088/1757-899X/461/1/012090
M3 - Conference article
AN - SCOPUS:85059386358
VL - 461
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
SN - 1757-8981
IS - 1
M1 - 012090
T2 - 5th International Conference Recent Trends in Structural Materials, COMAT 2018
Y2 - 14 November 2018 through 16 November 2018
ER -
ID: 36552075