Hardening of a metallic glass during cyclic loading in the elastic range

TitleHardening of a metallic glass during cyclic loading in the elastic range
Publication TypeJournal Article
Year of Publication2008
AuthorsPackard, CE, Witmer, LM, Schuh, CA
JournalApplied Physics Letters
Volume92
Issue17
Date Published2008/04/28/
Abstract

Although fatigue failure is well documented in metallic glasses, the mechanism responsible for damage accumulation during cyclic loading below the yield point remains elusive. This letter describes a high-resolution nanomechanical study of an Fe-based bulk metallic glass subjected to cyclic loading in the nominal elastic range. An increase in the yield load was observed with an increasing number of subyield loading cycles, providing a clean documentation of kinematic irreversibility in very small volumes of material that experience no shear bands either prior to or during cyclic loading. (C) 2008 American Institute of Physics.