Re: Unfamiliar Term

Posted by RAB on September 06, 2004 at 23:17:17 from (195.93.34.11):

In Reply to: Unfamiliar Term posted by Allan in NE on September 06, 2004 at 09:35:34:

C"mon guys. It is a matallurgical term referring to the changes occurring in solid solutions of metals in various alloy forms. It is a bit like glass, which is an uncrystallised solid (super-cooled liquid?), getting more brittle as it ages and some of the molecules crystallise, allowing crack propagation more easily. If you don"t believe me, try cutting new glass and old glass - there is a large difference!
It has nothing to do with sodium chloride, which is a compound.
It can come about with heat, fatigue or chemical effects, so yes ageing is often given as a cause.
Regards, RAB

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