Plate bends when auto blasted

[Soul333]

Dear Professional,

I would like to understand why a 2mm thickness carbon steel plate bends when it is auto blasted (Mixture of Steel grit and Steel Shots). Has anyone encountered this issue.
Thank you.

 

[metengr]

Residual compressive stresses in the plate, which are introduced during blasting.

 

[EdStainless]

And this method is actually used to shape some parts.
People also use thin strips in a blast machine to measure the intensity of the blasting based on how much they bow.

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P.E. Metallurgy, Plymouth Tube

 

[racookpe1978]

It's a 2 mm (very thin!) wide plate being hit in the middle at high velocity by a high-mass stream of grit and air.
Impact matters. Energy matters.