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Re: Top A squeak

Author: Bassie
Date: 2006-02-14 07:47

BobD -

Mea culpa! 'Tougher', indeed. I should know better! Stronger, yes, but not tougher. Embrittled, in fact.

And you're right about bending at a different place - to an extent. A clarinet key will preferentially bend where the stress is highest - in the middle, or where the metal is thinnest.

Stainless steel illustrates work-hardening nicely. Ever bent a stainless knife? You can never get it quite flat again... the bent bit becomes very difficult very quickly, and you tend to end up with a knife with an 'S' bend in it. If you've ever taken a hacksaw to stainless, you'll have noticed the same phenomenon working against you. I'm not so sure of the properties of keywork alloys (though I know hacksaws are out of the question :-D). I imagine you want something that work-hardens fairly slowly.

Over-confidence is right. Softly softly catchee monkey. This is what they call 'engineer's feel' - knowing to stop turning the spanner (wrench) before the nut shears off.

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