If there is a retained unstable austenite - then by aging it decomposes and has a consequential volume expansion.
There may be other alloys too
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Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
Aluminium has a little known hygroscopic property when used in certain environments. It has a tendency (under worst case conditions) to absorb moisture in the air and swell, greatly reducing its current carrying capacity. This phenomena can be seen rather clearly when you stand under aluminium transmission lines when its raining (you get less wet than if you stand to the side). Many people believe that the sheets of insulation around aluminium busbars are to insulate the busbars to prevent flash over due to the voltage, in actual fact they are there to create a nice warm environment to dry the aluminum out if it absorbs too much moisture. This is also why you will sometimes see heaters in cabinets containing aluminium bus work.
Note - as a power engineer one of the FIRST things you are taught is to never, ever under any circumstances go out and try to dry a water-laden aluminium bus bar with a towel (this is also grounds for instant dismissal).
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Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
METALS
Re: METALS
