دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a fatigue state of metal that may be caused by trapping atomic hydrogen in the structure of the steel. Characterized by loss of ductility. May also be caused by work hardening or other factor.

a shallow zone of (usually) higher strength surrounding a perforation, cavity or the bore hole, caused by explosive effects or other pressure factors and possibly related to the mechanics of work hardening.

n: hardness developed in metals as a result of cold-working.

a metal deterioration in which the metal becomes progressively harder and more brittle with repeated application of load.