Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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High Temperature Deformation Behavior and Estimation for Formability of Zr55Cu30Al10Ni5 Bulk Metallic Glass

Zr계 비정질 합금의 고온 변형거동과 성형성 예측

  • 전현준 (포항공과대학교 신소재공학과) ;
  • 이광석 (포항공과대학교 항공재료센터) ;
  • 장영원 (포항공과대학교 신소재공학과)
  • Published : 2007.07.01
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Abstract

Deformation behavior of $Zr_{55}Cu_{30}Al_{10}Ni_5$(at. %) bulk metallic glass(BMG) fabricated by suction casting method has been investigated at elevated temperatures in this study. The BMG was first verified to have an amorphous structure with the analysis of X-ray diffraction(XRD) and differential scanning calorimetry(DSC) data. A series of compression tests has consequently been performed in the region of supercooled liquid temperature to investigate the behavior of high temperature deformation. A transition from Newtonian to non-Newtonian flow appeared to take place depending upon both the strain rate and test temperature. A processing map based on a dynamic materials model has been constructed to estimate a feasible forming condition for this BMG alloy.

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References

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