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Cold Work vs. Shot-Peening 1

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Neubaten

Industrial
Oct 29, 2006
129
ES


Imagine an aluminium flat coupon (2" thick) having a central hole under traction/compression alternate tension.

What process would you apply for increasing fatigue life:

Cold working the internal diameter by interference or shot-peening the hole?

Supose both process are optimized to their maximum potential.

 
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There are many reasons to pick one over the other. Most are based upon what is most suitable to do from a practical standpoint. I am not sure how the depth of the compressive layers differ for each method.

However, data (proprietary) which I have seen indicates that a cold-worked hole is superior to shot-peened holes. This is most likely due to the fact that cold-working is a uniform process than with shot-peening.

jetmaker
 
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