Anisotropic Phase Transformation in B2 Crystalline CuZr Alloy

Bulk metallic glasses have attracted considerable attention due to their excellent mechanical and physical properties, such as high strength, elasticity, high hardness combined with excellent corrosion resistance, etc

Shayuan Weng

2019

Scholarcy highlights

  • Bulk metallic glasses have attracted considerable attention due to their excellent mechanical and physical properties, such as high strength, elasticity, high hardness combined with excellent corrosion resistance, etc
  • Some B2 crystalline CuZr precipitations would be inherently formed through the crystallization in CuZr glass under loading, and undergo twinning and dislocation gliding, inducing the change in the mechanical properties of BMGs, as was found in the experiment
  • In this work, the responses and phase transformation of CuZr samples subjected to uniaxial tension and compression along, 110, 111 orientations are studied respectively using molecular dynamics simulations, making use of the latest interatomic potential, from which the following main conclusions can be drawn: 1
  • B2→Face-centered cubic, B2→BCT, and B2→Hexagonal close-packed phase transformations are found to be realized by unique mechanisms respectively which are lattice rotation, uniform deformation and separation from Cu and Zr atomic layer for each
  • Phase transformation region can be recovered after unloading before local amorphization, showing the superelasticity

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