necking down

necking down

[′nek·iŋ ¦dau̇n]
(metallurgy)
Localized reduction in cross-sectional area of a specimen during tensile deformation.
References in periodicals archive ?
Necking down can also result in all of the neck being too thick.
ON Wednesday morning I got on to a packed Tube train and encountered a drunken youth necking down cheap wine.
You would think that necking down rifle brass to a smaller caliber would be simple and trouble-free, but that's not always the case.
I have encountered a doughnut ring formed at the junction of the case neck and shoulder when necking down brass.