Research output: Contribution to journal › Conference article › peer-review
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.
Original language | English |
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Article number | 012090 |
Number of pages | 6 |
Journal | IOP Conference Series: Materials Science and Engineering |
Volume | 461 |
Issue number | 1 |
DOIs | |
State | Published - 10 Dec 2018 |
Event | 5th International Conference Recent Trends in Structural Materials, COMAT 2018 - Pilsen, Czech Republic Duration: 14 Nov 2018 → 16 Nov 2018 |
ID: 36552075