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A hierarchical nanolamella-structured alloy with excellent combinations of tensile properties

Li, Ming ; Guo, Defeng ; Ma, Tengyun ; Shi, Yindong ; Zhang, Guosheng ; Zhang, Xiangyi

Materials Science & Engineering A, 12 June 2014, Vol.606, pp.396-400 [Periódico revisado por pares]

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  • Título:
    A hierarchical nanolamella-structured alloy with excellent combinations of tensile properties
  • Autor: Li, Ming ; Guo, Defeng ; Ma, Tengyun ; Shi, Yindong ; Zhang, Guosheng ; Zhang, Xiangyi
  • Assuntos: Hierarchical Structure ; Ductility ; Severe Plastic Deformation ; Cold Deformation ; Engineering
  • É parte de: Materials Science & Engineering A, 12 June 2014, Vol.606, pp.396-400
  • Descrição: Dual phase ( + )-Ti alloys with a fully fine laminated microstructure usually exhibit a high strength but a limited ductility. In the present study, a hierarchical nanolaminated microstructure consisting of lamellae with nano- and submicrometer-sized widths has been produced in a TiZrAlV alloy by employing severe plastic deformation (SPD) combined with subsequent thermal annealing. The hierarchical nanolamella-structured Ti alloy exhibits excellent combinations of tensile properties, e.g., an ultimate tensile strength =1600 MPa and an elongation to failure =6.5%. The high strength can be attributed to the formation of a lot of nanoscale lamellae in the alloy, and the enhanced ductility results mainly from both the coarse lamellae that have a high strain hardening capability and the complex strain paths caused by a hierarchical nanolaminated structure.
  • Idioma: Inglês

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