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Metal finishing Q&As since 1989

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Shot peening of titanium

DO WE HAVE TO ETCH TITANIUM TO REMOVE .0002 TO .0004 INCH MATERIAL FROM EACH SURFACE TO REMOVE CONTAMINATION AND EMBEDDED METAL BEFORE SHOT PEENING OR CAN WE SHOT PEEN FINISH MACHINED PART AFTER DEGREASING?

HASHIR A KHAN
AEROSPACE - SANTA ANA, California
2006

It all depends on design/drawing requirements. You would normally remove material prior to flaw detection rather than shot peening as this removes smeared material after machining to ensure any flaws are revealed.
I would suspect that general cleaning (degreasing, aqueous washing or similar) would be sufficient prior to shot peening (but don't quote me on that). If in doubt check with your customer who will willingly tell you what they require.

Brian Terry
Aerospace - Yeovil, Somerset, UK
2006

You can dip in 50% nitric acid before ,or after if you used steel media for shot peening. Good luck

Khair Shishani
aircraft maintenance - Al Ain, UAE
2006

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