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Author Li, Xifeng ♦ Lei, Kun ♦ Song, Peng ♦ Liu, Xinqin ♦ Zhang, Fei ♦ Li, Jianfei ♦ Chen, Jun
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword aluminum alloy 2219 ♦ precipitate ♦ strengthening ♦ thermo-mechanical treatment ♦ Characterization and Evaluation of Materials ♦ Tribology, Corrosion and Coatings ♦ Quality Control, Reliability, Safety and Risk ♦ Engineering Design
Abstract Strengthening of aluminum alloy 2219 by thermo-mechanical treatment has been compared with artificial aging. Three simple deformation modes including pre-stretching, compression, and rolling have been used in thermo-mechanical treatment. The tensile strength, elongation, fracture feature, and precipitated phase have been investigated. The results show that the strengthening effect of thermo-mechanical treatment is better than the one of artificial aging. Especially, the yield strength significantly increases with a small decrease of elongation. When the specimen is pre-stretched to 8.0%, the yield strength reaches 385.0 MPa and increases by 22.2% in comparison to the one obtained in aging condition. The maximum tensile strength of 472.4 MPa is achieved with 4.0% thickness reduction by compression. The fracture morphology reveals locally ductile and brittle failure mechanism, while the coarse second-phase particles distribute on the fracture surface. The intermediate phases θ″ or θ′ orthogonally precipitate in the matrix after thermo-mechanical treatment. As compared to artificial aging, the cold plastic deformation increases distribution homogeneity and the volume fraction of θ′′ or θ′ precipitates. These result in a better strengthening effect.
ISSN 10599495
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-08-20
Publisher Place New York
e-ISSN 15441024
Journal Journal of Materials Engineering and Performance
Volume Number 24
Issue Number 10
Page Count 7
Starting Page 3905
Ending Page 3911

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Source: SpringerLink