Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 24, Issue 8, Pages 2453-2458Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(14)63370-7
Keywords
deformation; homogenization; cryogenic treatment; microstructure; Portevin-Le Chatelier effect
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Funding
- National Key Technology R&D Program of China [2011BAC10B02]
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The mechanical properties of 3104 aluminum alloy processed by different combinations of cryogenic and homogenization treatments were studied. The 3104 aluminum alloy processed by the cryogenic treatment followed by homogenization exhibited an enhancement in the tensile strength, yield strength, and elongation by 29%, 41%, and 11%, respectively, as compared with a sample processed by the conventional homogenization treatment. The stress-strain curve of the sample processed by the homogenization treatment exhibited the Portevin-Le Chatelier effect, whereas the sample processed by the cryogenic treatment did not. Further, the cryogenic treatment could accelerate the precipitation of secondary phase particles for the sample processed by a deep cryogenic treatment, followed by a homogenization treatment, which enhanced the dislocation pinning effect of the solvent atoms and thus improved the critical strain.
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