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Precipitation strengthening in an ultralight magnesium alloy

Author

Listed:
  • Song Tang

    (The University of New South Wales)

  • Tongzheng Xin

    (The University of New South Wales)

  • Wanqiang Xu

    (The University of New South Wales)

  • David Miskovic

    (The University of New South Wales)

  • Gang Sha

    (Nanjing University of Science and Technology)

  • Zakaria Quadir

    (Curtin University)

  • Simon Ringer

    (The University of Sydney)

  • Keita Nomoto

    (The University of Sydney)

  • Nick Birbilis

    (Monash University)

  • Michael Ferry

    (The University of New South Wales)

Abstract

Body-centred cubic magnesium-lithium-aluminium-base alloys are the lightest of all the structural alloys, with recently developed alloy compositions showing a unique multi-dimensional property profile. By hitherto unrecognised mechanisms, such alloys also exhibit exceptional immediate strengthening after solution treatment and water quenching, but strength eventually decreases during prolonged low temperature ageing. We show that such phenomena are due to the precipitation of semi-coherent D03-Mg3Al nanoparticles during rapid cooling followed by gradual coarsening and subsequent loss of coherency. Physical explanation of these phenomena allowed the creation of an exceptionally low-density alloy that is also structurally stable by controlling the lattice mismatch and volume fraction of the Mg3Al nanoparticles. The outcome is one of highest specific-strength engineering alloys ever developed.

Suggested Citation

  • Song Tang & Tongzheng Xin & Wanqiang Xu & David Miskovic & Gang Sha & Zakaria Quadir & Simon Ringer & Keita Nomoto & Nick Birbilis & Michael Ferry, 2019. "Precipitation strengthening in an ultralight magnesium alloy," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08954-z
    DOI: 10.1038/s41467-019-08954-z
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    Cited by:

    1. Binglu Zhang & Qisi Zhu & Chi Xu & Changtai Li & Yuan Ma & Zhaoxiang Ma & Sinuo Liu & Ruiwen Shao & Yuting Xu & Baolong Jiang & Lei Gao & Xiaolu Pang & Yang He & Guang Chen & Lijie Qiao, 2022. "Atomic-scale insights on hydrogen trapping and exclusion at incoherent interfaces of nanoprecipitates in martensitic steels," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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