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Nanostructural hierarchy increases the strength of aluminium alloys

Author

Listed:
  • Peter V. Liddicoat

    (Australian Centre for Microscopy and Microanalysis and ARC Centre of Excellence for Design in Light Metals, The University of Sydney)

  • Xiao-Zhou Liao

    (School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney)

  • Yonghao Zhao

    (University of California)

  • Yuntian Zhu

    (North Carolina State University)

  • Maxim Y. Murashkin

    (Institute of Physics of Advanced Materials, Ufa State Aviation Technical University)

  • Enrique J. Lavernia

    (University of California)

  • Ruslan Z. Valiev

    (Institute of Physics of Advanced Materials, Ufa State Aviation Technical University)

  • Simon P. Ringer

    (Australian Centre for Microscopy and Microanalysis and ARC Centre of Excellence for Design in Light Metals, The University of Sydney)

Abstract

Increasing the strength of metallic alloys while maintaining formability is an interesting challenge for enabling new generations of lightweight structures and technologies. In this paper, we engineer aluminium alloys to contain a hierarchy of nanostructures and possess mechanical properties that expand known performance boundaries—an aerospace-grade 7075 alloy exhibits a yield strength and uniform elongation approaching 1 GPa and 5%, respectively. The nanostructural architecture was observed using novel high-resolution microscopy techniques and comprises a solid solution, free of precipitation, featuring (i) a high density of dislocations, (ii) subnanometre intragranular solute clusters, (iii) two geometries of nanometre-scale intergranular solute structures and (iv) grain sizes tens of nanometres in diameter. Our results demonstrate that this novel architecture offers a design pathway towards a new generation of super-strong materials with new regimes of property-performance space.

Suggested Citation

  • Peter V. Liddicoat & Xiao-Zhou Liao & Yonghao Zhao & Yuntian Zhu & Maxim Y. Murashkin & Enrique J. Lavernia & Ruslan Z. Valiev & Simon P. Ringer, 2010. "Nanostructural hierarchy increases the strength of aluminium alloys," Nature Communications, Nature, vol. 1(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:1:y:2010:i:1:d:10.1038_ncomms1062
    DOI: 10.1038/ncomms1062
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    Cited by:

    1. Qiang Lu & Jianchuan Wang & Hongcheng Li & Shenbao Jin & Gang Sha & Jiangbo Lu & Li Wang & Bo Jin & Xinyue Lan & Liya Li & Kai Li & Yong Du, 2023. "Synergy of multiple precipitate/matrix interface structures for a heat resistant high-strength Al alloy," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Hai Wang & Wei Song & Mingfeng Liu & Shuyuan Zhang & Ling Ren & Dong Qiu & Xing-Qiu Chen & Ke Yang, 2022. "Manufacture-friendly nanostructured metals stabilized by dual-phase honeycomb shell," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. Bo Xiao & Junhua Luan & Shijun Zhao & Lijun Zhang & Shiyao Chen & Yilu Zhao & Lianyong Xu & C. T. Liu & Ji-Jung Kai & Tao Yang, 2022. "Achieving thermally stable nanoparticles in chemically complex alloys via controllable sluggish lattice diffusion," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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