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A light-weight high-entropy alloy Al20Be20Fe10Si15Ti35

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Abstract

A light-weight high-entropy alloy (LWHEA) Al20Be20Fe10Si15Ti35 has been developed to have unique mechanical properties and oxidation resistance. One major and two minor phases are observed in the as-cast microstructure. The density of the alloy is 3.91 g cm−3, and its hardness is HV 911, which is higher than quartz. The hardness and hardness to density ratio are the highest of all light-weight alloys reported before. In addition, it has excellent oxidation resistance at 700°C and 900°C, which far exceeds that of Ti-6Al-4V. Thus, the combination of properties is promising for high-temperature applications, which require light weight, wear-resistant and oxidation-resistant components.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, ‘National’ Tsing Hua University, Hsinchu 300, Taiwan, China

    KoKai Tseng, YaChu Yang, ChienChang Juan, TsungShune Chin, CheWei Tsai & JienWei Yeh

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  1. KoKai Tseng
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  2. YaChu Yang
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  3. ChienChang Juan
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  4. TsungShune Chin
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  5. CheWei Tsai
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  6. JienWei Yeh
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Correspondence to JienWei Yeh.

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Tseng, K., Yang, Y., Juan, C. et al. A light-weight high-entropy alloy Al20Be20Fe10Si15Ti35. Sci. China Technol. Sci. 61, 184–188 (2018). https://doi.org/10.1007/s11431-017-9073-0

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