; Li, H. X.
; Chen, G. L.
; Hui, X. D.
; Lu, Z. P.] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
; [Wang, B. Y.] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Anal Tech, Beijing 100049, Peoples R China
Unusual nonlinear deformation behavior with irreversible elongation has been observed in micrometer sized Co-based amorphous wires, and our analysis indicated that this nonlinear deformation is related to the formation of sub-nanometer voids coalesced from flow defects under the tensile stress. Amorphous wires with smaller diameters exhibit a lower apparent yield point, and the smaller shear transformation zone energy barriers associated with faster cooling rates applied during the fabrication process of these wires are responsible for their earlier apparent yielding and resultant elongation. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.