The Effect of Ageing Treatment of Aluminum Alloys for Fuselage Structure-Light Aircraft

As the material used for fuselage structure must possess low density, high strength to weight ratio, the selection of appropriate materials for fuselage structure is one of the most important tasks. Aluminum metal itself is soft and low in strength. It can be made stronger by giving proper combination of suitable alloy addition, mechanical treatment and thermal treatment. The usual thermal treatment given to aluminum alloys is called age-hardening or precipitation hardening. In this paper, the studies are carried out on 7075 aluminum alloy which is how to improve strength level for fuselage structure. The marked effect of the strength on the ternary alloy is clearly demonstrated at several ageing times and temperatures. It is concluded that aluminum-zinc-magnesium alloy can get the highest strength level in natural ageing.

Authors:

• Shwe Wut Hmon Aye
• Kay Thi Lwin
• Waing Waing Kay Khine Oo

Keywords:

• Aluminum alloy
• ageing
• heat treatment
• strength.

References:

[1] Flinn Trojan, January 1968, Journal of Institute of Metals, Vol 7, 40-50.
[2] Dennis, W.H. 1961. Metallurgy of the Non-Ferrous Metals.
[3] Donald R. 1994, Askeland, The Science and Engineering of Materials,
Third Edition.
[4] A. K. Watkins and V. Kondic, November 1963, Foundry Journal, 53-63.
[5] I. J. Polemear, 1957-58, Journal of Institute of Metals, Vol-86, 113-121.