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Experimental and numerical study on the dynamic shear banding mechanism of HfNbZrTi high entropy alloy

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Abstract

High-entropy alloys (HEAs) have attracted considerable attention in recent years because of their unique mechanical properties. In this work, the mechanism of dynamic shear banding (also called adiabatic shear bands, ASBs) in a BCC HEA HfNbZrTi was investigated combining dynamic experiments and numerical simulations. The temperature evolution during dynamic shear banding, which has been believed to play a dominant role during ASB formation in the literature, was measured using high-speed infrared thermal detectors synchronized with a split Hopkinson pressure bar system. The dynamic mechanical behavior of the BCC HEA was described using the Johnson-Cook model accompanied by damage accumulation. The process of ASB formation, considering potential contributions from thermal softening and damage softening, was numerically investigated by controlling the activation of each softening mechanism separately. Based on the results of experimental observation and numerical analysis, dynamic shear banding in this BCC HEA is proposed to be dominated by damage softening, and thermal softening only plays a secondary role, which differs from the thermal-softening-dominated ASB formation in typical FCC HEAs such as the Cantor alloy.

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Authors and Affiliations

  1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, China

    Wei-Li Song, Quan Ma, QingLei Zeng, ShengXin Zhu, Wei Qi, YinQiang Chen & Hao-Sen Chen

  2. Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Beijing, 100081, China

    Wei-Li Song, Quan Ma, QingLei Zeng, ShengXin Zhu, Wei Qi, YinQiang Chen & Hao-Sen Chen

  3. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    MingBin Sui, TangQing Cao & YunFei Xue

  4. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, 212013, China

    XiaoQi Yu

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  1. Wei-Li Song
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Correspondence to QingLei Zeng.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11922202, 12002050, and 11802029), the National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact (Grant No. 6142902200401), and the Beijing Institute of Technology Research Fund Program for Young Scholars.

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Song, WL., Ma, Q., Zeng, Q. et al. Experimental and numerical study on the dynamic shear banding mechanism of HfNbZrTi high entropy alloy. Sci. China Technol. Sci. 65, 1808–1818 (2022). https://doi.org/10.1007/s11431-022-2086-9

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  • DOI: https://doi.org/10.1007/s11431-022-2086-9

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