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- W1977416368 abstract "Experiments were conducted on a commercial Al-7075 alloy by processing by ECAP for 4 passes and then processing by HPT for up to a maximum of 20 turns. Measurements show that the grains were refined to ~680 nm after ECAP and to ~310 nm in the center of the disk after ECAP+HPT. Tensile testing at a temperature of 623 K revealed lower flow stresses and higher elongations to failure after processing by ECAP+HPT. Thus, the alloy was not superplastic after processing by ECAP but superplasticity was achieved with elongations up to ~800% after processing by ECAP+HPT. By plotting the Vickers microhardness against equivalent strain, it is shown that the hardness saturates at Hv≈250 after ECAP+HPT. This saturation hardness is higher than the value of Hv≈230 recorded after processing by HPT without a preceding step of ECAP. The results demonstrate that processing by ECAP+HPT produces higher hardness and greater grain refinement than processing only by HPT." @default.
- W1977416368 created "2016-06-24" @default.
- W1977416368 creator A5035445248 @default.
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- W1977416368 date "2014-02-01" @default.
- W1977416368 modified "2023-09-27" @default.
- W1977416368 title "A critical evaluation of the processing of an aluminum 7075 alloy using a combination of ECAP and HPT" @default.
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- W1977416368 doi "https://doi.org/10.1016/j.msea.2013.12.034" @default.
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