| Issue |
J. Phys. Colloques
Volume 48, Number C3, Septembre 1987
4th International Aluminium Lithium Conference
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|---|---|---|
| Page(s) | C3-117 - C3-122 | |
| DOI | https://doi.org/10.1051/jphyscol:1987314 | |
J. Phys. Colloques 48 (1987) C3-117-C3-122
DOI: 10.1051/jphyscol:1987314
CASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS
C.H. TONG, L.G. YAO, C.Y. NIEH, C.P. CHANG et S.E. HSUChung shan Institute of Science and Technology, P.O. Box 1-26-4, Lung-Tan, Taiwan 32500, Republic of China
Abstract
The objective of the present work is to study the casting characteristics of various Al-Li alloys, which include fluidity and strengths of the alloys and their interaction with cast molds. Materials investigated are Al-Li-Mg and Al-Li-Cu-Mg alloys with Li content of 2.5 wt%. The results show that sand molds with resin binders are good for Al-Li casting. Ceramic coatings can further reduce the metal-mold interactions. However, the permeability is also reduced by coating. The fluidity of Li-bearing aluminum alloys is inferior to that of A356. Compared with copper, magnesium gives a better combination of fluidity and strength to Al-Li alloys. Al-Li-Cu, together with Al-Li-Mg, are capable of providing a wide range of strength-ductility combination to casting designs. Al-Li-Mg sand cast also possesses around 80% of the strength of its wrought counterpart.