Rejuvenation of metallic glasses by non-affine thermal strain

S. V. Ketov, Y. H. Sun, S. Nachum, Z. Lu, A. Checchi, A. R. Beraldin, H. Y. Bai, W. H. Wang, D. V. Louzguine-Luzgin, M. A. Carpenter and A. L. Greer ()
Additional contact information
S. V. Ketov: WPI Advanced Institute for Materials Research (WPI-AIMR), Tohoku University
Y. H. Sun: University of Cambridge
S. Nachum: University of Cambridge
Z. Lu: Institute of Physics, Chinese Academy of Sciences
A. Checchi: University of Cambridge
A. R. Beraldin: University of Cambridge
H. Y. Bai: Institute of Physics, Chinese Academy of Sciences
W. H. Wang: Institute of Physics, Chinese Academy of Sciences
D. V. Louzguine-Luzgin: WPI Advanced Institute for Materials Research (WPI-AIMR), Tohoku University
M. A. Carpenter: University of Cambridge
A. L. Greer: WPI Advanced Institute for Materials Research (WPI-AIMR), Tohoku University

Nature, 2015, vol. 524, issue 7564, 200-203

Abstract: This study shows that metallic glasses can be rejuvenated (taken to higher energy states with more plasticity) by thermally cycling them at relatively low temperatures (well below the glass transition temperature); this is attributed to the effect of intrinsic structural inhomogeneities in the glassy state, which translate into localized internal strains as the temperature is cycled and the different regions expand and contract by different amounts.

Date: 2015
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DOI: 10.1038/nature14674

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