A Damage-tolerant Bulk Metallic Glass at Liquid-nitrogen Temperature

doi:10.1016/j.jmst.2014.04.017

Abstract

Abstract: Tensile tests and notch toughness tests were conducted on Zr₆₁Ti₂Cu₂₅Al₁₂ glass (ZT) at room temperature and liquid-nitrogen temperature. The tensile strength of ZT was improved from 1.63 GPa at room temperature to 1.72 GPa at liquid-nitrogen temperature. Micro-notches with a root radius of 1–3 μm were introduced to test the notch toughness of ZT at room temperature and liquid-nitrogen temperature. The test results revealed that the notch toughness of ZT at liquid-nitrogen temperature is comparable to that of ZT at room temperature. The combination of high yield strength and notch toughness of ZT at liquid-nitrogen temperature is comparable to that of the best cryogenic engineering materials.

Key words: Metallic glasses, Yield strength, Fracture toughness, Liquid-nitrogen temperature

Yi Jun, Seifi S. Mohsen, Wang Weihua, Lewandowski John J.. A Damage-tolerant Bulk Metallic Glass at Liquid-nitrogen Temperature[J]. J. Mater. Sci. Technol., 2014, 30(6): 627-630.

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