This study demonstrates that permanent deformation results when an amorphous alloy is subjected to a stress below yield at room temperature. The resultant deformation was observed to be homogeneous and is thought to occur as a result of the structural disordering, in which densely packed short-range ordered clusters break down to form new, loosely packed ones. It was found that this disordering process is irreversible even if the applied stress is removed, resulting in the creation of excess free volume. These findings were analyzed using the molecular dynamics simulations in the light of atomic-scale structural changes.
Bibliographical noteFunding Information:
J.C. acknowledges the support from the Nanostructured Materials Technology Development under the 21st Century Frontier R&D Programs (04K1501-00510) of the Ministry of Science and Technology, Korea, and the Next Generation-New Technology Development program (10006938-2005-21) of the Ministry of Commerce, Industry, and Energy, Korea. M.L.F. acknowledges the support of the U.S. NSF under Award No. 0135009. Y.S. gratefully acknowledges the support from the Ministry of Education, Culture, Sports, Science, and Technology in Japan, Grant-in-Aid for Scientific Research on Priority Areas (15074214).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)