Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635992 | Transactions of Nonferrous Metals Society of China | 2015 | 7 Pages |
Abstract
Plentiful sodium was introduced into the alloy using salt fluxes as medium, then the existing form and influence of sodium on the microstructure and tensile properties of Al-4.5%Cu (mass fraction) alloy were investigated. It is proved that the elemental sodium segregates at the grain boundaries of Al-4.5%Cu alloy and weakens the bond between the matrix and CuAl2-phase. After T6 heat treatment, sodium results in micro-fracture and induces the residual of CuAl2-phase in Al-4.5%Cu alloy. The tensile test results show that the sodium causes a transition from dimple fracture to intergranular fracture, which makes the mechanical performance of Al-4.5%Cu decrease dramatically.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Le FENG, Yi-min SUN, Xiao-lin ZHAO, Ri-ming WANG, Kai ZHANG, Jin-yue YANG,