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Nanocrystals generated under tensile stress in metallic glasses with phase selectivity

Abstract

Revealing the mechanism of phase selectivity can provide the guidance for controlling the crystals with certain phase for special property. In present work, nanocrystals in sizes of about 2–4 nm diameters with the B2 structure (thermodynamic metastable phase) are generated from the CuZr glassy fiber by applied tensile stress at ambient temperature. Combined the ab initio calculations with the molecular dynamics simulations, the stabilities of B2 austenite and B19' martensitic phases under applied tensile stress are compared, and the phase transformation mechanism is revealed. The results present that the B2 structure has a bigger attractive basin, and phase transition could occur with a larger applied stress during the deformation. Therefore, the insight of the higher symmetric B2 nanocrystal with selectivity nucleation driven under directional stress is demonstrated.

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Publication details

The article was received on 21 Jun 2017, accepted on 13 Sep 2017 and first published on 14 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR04466F
Citation: Nanoscale, 2017, Accepted Manuscript
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    Nanocrystals generated under tensile stress in metallic glasses with phase selectivity

    Y. Feng, W. Liao, J. Zheng, L. Wang, Y. Zhang, J. Sun and F. Pan, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04466F

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