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Science China Materials

, Volume 62, Issue 5, pp 736–744 | Cite as

Graded microstructures of Al-Li-Mg-Zn-Cu entropic alloys under supergravity

  • Ruixuan Li (李蕊轩)
  • Zhe Wang (王哲)
  • Zhancheng Guo (郭占成)
  • Peter K. Liaw
  • Tao Zhang (张涛)
  • Lugee Li (李扬德)
  • Yong Zhang (张勇)Email author
Articles
  • 214 Downloads

Abstract

Investigating the microstructures and properties of gradient materials has been regarded as a promising way to accelerate the identification of optimal compositions for applications. Herein, a supergravity method is applied to prepare the graded entropic alloys Al-Zn-Li-Mg-Cu. Through carefully optimizing the experimental conditions, the graded microstructures and hardness values appear after the supergravity technique. The morphology of the alloy significantly changes from the bulk intermetallics to eutectic structures along the supergravity force direction, which results from the crushed and graded aluminum oxide combined with the extremely-strong force. The results show that with this supergravity method, a performance-enhanced alloy can potentially be achieved through the centrifugation in a short time span and thus it paves the way for designing and synthesizing entropic alloys with intriguing properties.

Keywords

entropic alloys supergravity graded microstructures grain refinement viscosity 

超重力场下Al-Li-Mg-Zn-Cu多组元合金的梯度结构

摘要

研究梯度材料的组织结构及其性能可以加速开发具有优异性能的新成分材料. 本文提出一种新方法来制备梯度多组元合金Al-Li- Mg-Zn-Cu——超重力法(即离心). 通过实验条件的优化和系统的表征, 我们发现超重力处理后出现了梯度组织结构和硬度值. 沿着超重 力方向, 合金的组织结构从大块金属间化合物转化为共晶结构, 同时铝的氧化物也在离心中被打碎并沿着这一方向梯度分布. 实验结果表 示, 通过短时间离心的超重力方法有望提升合金综合性能并加快高性能多组元合金的开发.

Notes

Acknowledgements

Zhang Y would like to thank the financial support from the National Natural Science Foundation of China (NSFC, 51471025 and 51671020).

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Ruixuan Li (李蕊轩)
    • 1
    • 2
  • Zhe Wang (王哲)
    • 3
  • Zhancheng Guo (郭占成)
    • 3
  • Peter K. Liaw
    • 4
  • Tao Zhang (张涛)
    • 5
  • Lugee Li (李扬德)
    • 5
  • Yong Zhang (张勇)
    • 1
    • 2
    Email author
  1. 1.State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijingChina
  2. 2.Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceUniversity of Science and Technology BeijingBeijingChina
  3. 3.State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijingChina
  4. 4.Department of Materials Science and EngineeringThe University of TennesseeKnoxvilleUSA
  5. 5.Dongguan EON Institute for Advanced MaterialsDongguanChina

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