Approaching the ideal elastic limit of metallic glasses
Author(s)Tian, Lin; Cheng, Yong-Qiang; Shan, Zhi-Wei; Li, Ju; Wang, Cheng-Cai; Han, Xiao-Dong; Sun, Jun; Ma, Evan; ... Show more Show less
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The ideal elastic limit is the upper bound to the stress and elastic strain a material can withstand. This intrinsic property has been widely studied for crystalline metals, both theoretically and experimentally. For metallic glasses, however, the ideal elastic limit remains poorly characterized and understood. Here we show that the elastic strain limit and the corresponding strength of submicron-sized metallic glass specimens are about twice as high as the already impressive elastic limit observed in bulk metallic glass samples, in line with model predictions of the ideal elastic limit of metallic glasses. We achieve this by employing an in situ transmission electron microscope tensile deformation technique. Furthermore, we propose an alternative mechanism for the apparent 'work hardening' behaviour observed in the tensile stress–strain curves.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Nature Publishing Group
Tian, Lin, Yong-Qiang Cheng, Zhi-Wei Shan, Ju Li, Cheng-Cai Wang, Xiao-Dong Han, Jun Sun, and Evan Ma. “Approaching the ideal elastic limit of metallic glasses.” Nature Communications 3 (January 3, 2012): 609. © 2012 Nature Publishing Group, a division of Macmillan Publishers Limited
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