Aluminium alloys are ligt and traditionally used, crystal dislocatons are locked by adding magnezium, zinc and others, in general they not support concentrated loads, are proned to accelate fatigue, in general they catastrofally fail whith some variations depend on composition, faster in cold atmospere.
I broke apart an experimental piece built in common aviation alloy in less than 3 secounds by scratcing it less ttan 0,3mm deed and 3 mm long by appling ultrasound, the piece craks internally.
In result any scatch must be removed.
Titanium alloys are sturdy, they heat up on dynamic overstress, not fail, the same piece in titanium not fail if it scratched, but titanium is twice heavier than aluminium, but is more than twice stronger, structure can be light as aluminium made one, but is rare and espansive, is poor heat conductor, but is better than composites.
Composites are light and strong and are not proned to fatigue, but fail catastrofally on overload, are poor electric conductors and can cath fire and burn.
Probably titanim, aramide or even long fiber asbest mashes can improve behaviour, aluminum mashes are allredy used to improve conductibility.
Aramide can be used as internal layers, not only as external reiforcement, probably it works better together long fiber asbest, mashes of carbon nanotubes are a great promise.
Also some organic polimers eg bilirbin based are exceptionally strong and can be used as mashes.
A sugestion of sanwitch: a core of carbon fiber, two layers of aramide and asbest, an envelope of carbon fiber and metalic mashes.
Composite can cath fire and burn, aluminium not withstand fire, but titanium withstand fire preety well.
I broke apart an experimental piece built in common aviation alloy in less than 3 secounds by scratcing it less ttan 0,3mm deed and 3 mm long by appling ultrasound, the piece craks internally.
In result any scatch must be removed.
Titanium alloys are sturdy, they heat up on dynamic overstress, not fail, the same piece in titanium not fail if it scratched, but titanium is twice heavier than aluminium, but is more than twice stronger, structure can be light as aluminium made one, but is rare and espansive, is poor heat conductor, but is better than composites.
Composites are light and strong and are not proned to fatigue, but fail catastrofally on overload, are poor electric conductors and can cath fire and burn.
Probably titanim, aramide or even long fiber asbest mashes can improve behaviour, aluminum mashes are allredy used to improve conductibility.
Aramide can be used as internal layers, not only as external reiforcement, probably it works better together long fiber asbest, mashes of carbon nanotubes are a great promise.
Also some organic polimers eg bilirbin based are exceptionally strong and can be used as mashes.
A sugestion of sanwitch: a core of carbon fiber, two layers of aramide and asbest, an envelope of carbon fiber and metalic mashes.
Composite can cath fire and burn, aluminium not withstand fire, but titanium withstand fire preety well.
))) [/Sarcasm]