Materials Research Letters (Jan 2024)

Achieving superior high-temperature mechanical properties in Al-Cu-Li-Sc-Zr alloy with nano-scale microstructure via laser additive manufacturing

  • Yang Qi,
  • Hu Zhang,
  • Xu Yang,
  • Yilong Wang,
  • Changjun Han,
  • Wei Fan,
  • Jiawei Liang,
  • Haihong Zhu

DOI
https://doi.org/10.1080/21663831.2023.2285388
Journal volume & issue
Vol. 12, no. 1
pp. 17 – 25

Abstract

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Traditional aluminum alloys are unsuitable for structural use above 200 ℃ due to precipitate coarsening or dissolution. Laser powder bed fusion (LPBF) additive manufacturing technique enables fabricating novel aluminum alloys with enhanced high-temperature properties. This study focuses on investigating the mechanical properties and microstructural evolution of a novel LPBF-fabricated Al-Cu-Li-Sc-Zr alloy at elevated temperatures. The microstructure is characterized by nano-scale grains and precipitates. Excellent grain structure and precipitate stability result in superior high-temperature mechanical properties. This study advances additively manufactured aluminum alloy design for potential high-temperature applications, offering valuable insights into their behavior in extreme environments.

Keywords