Help! Metal knowledge please

T

thirteen

Joined
Mar 12, 2011
Messages
7
On my spyderco sprint run made of carpenter cts-xhp ,I was doing some work and put approx 30 degree
bend in the tip .The tip did not break and I bent it back to normal position .
It looks pretty much flawless like nothing happened .
My question ?
Will this have compromised the metal making a weak spot in the blade now ?even though there is no apparent damage and if so what can be done ?
Any feedback is much appreciated .
Thanks
 
No help really, more a general comment. Just use the knife and don't worry about it. If it breaks, it breaks, just sharpen it out.
 
The metal that bent will be work hardened and more likely to snap next time it gets stressed, the same as bending a wire back and forth.
When you "bend" metal (plastic deformation, not elastic) the atoms get moved out of their preferred arrangement (i.e. "atomic dislocations"), and the more disorganized they are the harder it is to move them around (work hardening). After enough bending they get so disorganized that the atoms cannot move around anymore, and you lose the tip of your knife.
 
thirteen said:
On my spyderco sprint run made of carpenter cts-xhp ,I was doing some work and put approx 30 degree
bend in the tip .The tip did not break and I bent it back to normal position .
It looks pretty much flawless like nothing happened .
My question ?
Will this have compromised the metal making a weak spot in the blade now ?even though there is no apparent damage and if so what can be done ?
Any feedback is much appreciated .
Thanks
Click to expand...
YES.

Can't do anything about it. Use it.
 
In forging they always "normalize" a blade before heat treating, eliminating internal stress (thermal cycling). If this were a one off piece for the next space shuttle... they would make a new one. I really can't think of any circumstance where re-heat treating a blade just to put the tip back to full strength would be worthwhile.
 
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