autofrettage

noun au·to·fret·tage \ ˈȯ-tō-ˌfre-tij \

Definition of autofrettage

plural -s
:the application of such interior pressure to the bore of a heavy ordnance gun as will deform the inner layers of steel beyond the elastic limit that would be reached by the explosion of any charge to be used subsequently in the gun

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Origin and Etymology of autofrettage

probably from French, from aut- + frettage


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