[TheForge] work hardening question

Tue Jan 29 07:19:10 2002

and panel work costs a fortune

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Tuesday, January 29, 2002 6:52 PM
Subject: Re: [TheForge] work hardening question


> To All,
> Airplanes are made from aluminum.  The newer ones have a lot of titanium
and
> composites but pre-composite planes like the 727, B-52, and others seem to
do
> just fine.  As a matter of fact the ideal material for aircraft is
aluminum
> because the elastic modulus / density ratio is the highest value for any
> economically available material.  Iron is a close second and titanium is
way
> down the list.  They don't build cars from aluminum because aluminum does
not
> rust and it is more expensive than steel.
>
> Hochewa
>
>
> In a message dated 1/28/02 11:21:23 AM Eastern Standard Time,
> [email protected] writes:
>
> << Aluminum, on the other hand, will break with even very small stresses
>  applied to it.  It'll take millions/billions of cycles, but it WILL
>  break.  Its one of the main reasons that aluminum isn't used on
production
>  cars (or so I've been told). >>
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