Study on the Mechanical Properties of Cast 6063 Al Alloy Using a Mixture of Aluminum Dross and Green Sand as Mold
No Thumbnail Available
Files
Date
2012
Authors
Adeosun, S.O.
Sekunowo, O.I.
Balogun, S.A.
Obembe, O.O.
Journal Title
Journal ISSN
Volume Title
Publisher
M The Journal of The Minerals, Metals & Materials Society (TMS)
Abstract
The mechanical characteristics of 6063 aluminum alloy cast in a mixture of
aluminum dross and silica sand as mold have been examined. The amount of
dross in the green silica sand was varied in the range of 0–80% with bentonite
as binder. In all, 40 samples were cast, and 8 of these were left in the as-cast
condition for control while 32 were first homogenized at 470C for 6 h and then
rolled in a two-high mill at ambient temperature to 10% reduction in one pass.
The rolled samples were solution heat treated at 515C for 8 h followed by
normalizing, annealing, and quench tempering, respectively. The samples
were then simulated and tensile behavior coupled with the evaluation of
microhardness and microstructures developed. The results obtained demonstrate significant improvement in mechanical properties from 50% to 80%
dross in the mold. Tensile strength increased to 177 MPa and 15% elongation
compared with conventional 6063-T5 aluminum alloy with 145 MPa tensile
strength and 8% elongation. The improvement in mechanical properties by the
quench-tempered samples can be attributed to the inducement of fine and
coherent Mg2Si crystals within the matrix. Furthermore, the overall analysis
of the proportion of dross to the size of cast show that about 64% of dross
generated can be utilized as mold material.
Description
Keywords
Citation
Adeosun, S.O.; Sekunowo, O.I.; Balogun, S.A.; Obembe, O.O. (2012). Study on the Mechanical Properties of Cast 6063 Al Alloy Using a Mixture of Aluminum Dross and Green Sand as Mold. JOM The Journal of The Minerals, Metals & Materials Society (TMS).