Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Influence of Stress-strain on the Microstructural Change in the Metallic Glass and Metallic Glass Matrix Composite

  • Kim, Song-Yi (Rare Metals R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, A-Young (Rare Metals R&D Group, Korea Institute of Industrial Technology) ;
  • Oh, Hye-Ryung (Rare Metals R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, Min-Ha (Rare Metals R&D Group, Korea Institute of Industrial Technology)
  • Received : 2015.05.30
  • Accepted : 2015.06.18
  • Published : 2015.06.30
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Abstract

At room temperature, metallic glasses deform inhomogeneously by strain localization into narrow bands as a result of yielding due to an external force. When shear bands are generated during deformation, often nanocrystals form at the shear bands. Experimental results on the deformation of bulk metallic glass in the current study suggest that the occurrence of nanocrystallization at a shear band implies the loading condition that induces deformation is more triaxial in nature than uniaxial. Under a compressive stress state, the geometrical constraint strain imposed by the stress triaxiality plays a crucial role in the deformation-induced nanocrystallization at the shear bands.

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References

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