Applied Microscopy

  • 제45권2호
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  • Pages.37-43
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  • 2015
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  • 2287-5123(pISSN)
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  • 2287-4445(eISSN)
한국현미경학회 (Korean Society of Microscopy)
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Phase Transformation and Work-hardening Behavior of Ti-based Bulk Metallic Glass Composite

  • Hong, Sung Hwan (Department of Nanotechnology and Advanced Materials Engineering, Sejong University) ;
  • Kim, Jeong Tae (Department of Nanotechnology and Advanced Materials Engineering, Sejong University) ;
  • Park, Hae Jin (Department of Nanotechnology and Advanced Materials Engineering, Sejong University) ;
  • Kim, Young Seok (Department of Nanotechnology and Advanced Materials Engineering, Sejong University) ;
  • Park, Jin Man (Global Technology Center, Samsung Electronics Co., Ltd.) ;
  • Suh, Jin Yoo (High Temperature Energy Materials Research Center, Korea Institute of Science & Technology (KIST)) ;
  • Na, Young Sang (Light Metal Division, Korea Institute of Materials Science (KIMS)) ;
  • Lim, Ka Ram (Light Metal Division, Korea Institute of Materials Science (KIMS)) ;
  • Kim, Ki Buem (Department of Nanotechnology and Advanced Materials Engineering, Sejong University)
  • 투고 : 2015.05.30
  • 심사 : 2015.06.24
  • 발행 : 2015.06.30
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초록

In present work, work-hardening behavior of TiCu-based bulk metallic glass composite with B2 particles has been studied by systemic structural and mechanical investigations. After yield, pronounced work-hardening of the alloy was clearly exhibited, which was mainly related to the martensitic transformation as well as the deformation twinning in B2 particles during deformation. At the early plastic deformation stage (work-hardening stage), the stress-induced martensitic transformation from B2 phase to B19' phase and deformation-induced twinning of B19' phase was preferentially occurred in the around interface areas between B2 phase and amorphous matrix by stress concentration. The higher hardness value was observed in vicinity of interface within the B2 particles which are probably connected with martensitic transformation and deformation twinning. This reveals that the work-hardening phenomenon of this bulk metallic glass composite is a result of the hardening of B2 particles embedded in amorphous matrix.

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