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      New ternary powder metallurgy Ti alloys via eutectoid and isomorphous beta stabilisers additions

      Paul, Manpreet; Alshammari, Yousef Namlan; Yang, Fei; Bolzoni, Leandro
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      New ternary PM Ti alloys via eutectoid and isomorphous.pdf
      Published version, 3.902Mb
      DOI
       10.1038/s41598-023-28010-7
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      Permanent link to Research Commons version
      https://hdl.handle.net/10289/15502
      Abstract
      A group of new ternary Ti alloys bearing eutectoid and isomorphous beta stabilising elements was created to be manufactured through the conventional powder metallurgy route. The effect of the simultaneous addition of the same amount of Mn and Nb on the manufacturability, properties, and hardening behaviour was investigated. The ternary alloys are composed of the α-Ti and β-Ti phases and have a lamellar microstructure resulting from the slow cooling upon sintering. However, the size of the equiaxed α grains and of the α + β lamellae is monotonically reduced, especially the interlamellar spacing, as the amount of alloying elements increases. Due to their physical properties, Mn enhances and Nb hinders densification during sintering resulting in a decreasing trend of the relative density with the alloying elements content. Consequently, the resistance to plastic deformation increases (UTS, 514–726 MPa), the ductility decreases (elongation, 13.2–2.6%), and the fracture mode changes from intergranular to transgranular. The new ternary alloys share the same hardening mechanism, but the amount of deformation after necking is, generally, higher for lower amounts of Mn and Nb.
      Date
      2023-01-20
      Type
      Journal Article
      Publisher
      Nature Research
      Rights
      © 2023 The Authors. This work is licensed under a CC BY 4.0 licence.
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      • Science and Engineering Papers [3124]
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