underaging, under-ageing, underage treatment
artificial ageing below peak ageing/aging temperature and time conditions, resulting in slightly reduced tensile strength and improved ductility, compared with peak aged metal (see: peak ageing/peak aging), kunstlik vanandamine allpool tippvanandamise temperatuuri ja kestust, mille tulemusena saadakse veidi väiksem tõmbetugevus ja parem sitkus võrreldes tippvanandamisega (vt tippvanandus)