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Metals 2017, 7(4), 151;

Reduced Fracture Toughness of Metallic Glass at Cryogenic Temperature

Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 20044, China
State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
Author to whom correspondence should be addressed.
Academic Editor: Klaus-Dieter Liss
Received: 27 February 2017 / Revised: 16 April 2017 / Accepted: 18 April 2017 / Published: 23 April 2017
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The effects of cryogenic temperature on the toughness of a Zr-based metallic glass are investigated. Based on three-dimensional fracture morphologies at different temperatures, the crack formation and propagation are analyzed. Through the calculation of the shear transformation zone volume, the shear modulus and bulk modulus of the metallic glass at different temperatures and the crack formation mechanism associated with the temperature is discussed. Once the crack commences propagation, the hyperelasticity model is used to elucidate the fractographic evolution of crack propagation. View Full-Text
Keywords: metallic glass; fracture toughness; cryogenic temperature; fractographic evolution metallic glass; fracture toughness; cryogenic temperature; fractographic evolution

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhou, Y.; Liu, J.; Han, D.; Chen, X.; Wang, G.; Zhai, Q. Reduced Fracture Toughness of Metallic Glass at Cryogenic Temperature. Metals 2017, 7, 151.

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