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An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6GPa for 0.75, 1 and 5 turns with a rotation speed of 1rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80nm. The hardness sharply increases with imposing strain...
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