Temperature Dependence of Dynamic Behavior of Commercially Pure Titanium by the Compression Test

CP-Ti의 동적거동에 미치는 온도의 영향

  • 이수민 (연세대학교 대학원 기계공학과) ;
  • 서송원 (연세대학교 대학원 기계공학과) ;
  • 박경준 (연세대학교 대학원 기계공학과) ;
  • 민옥기 (연세대학교 기계공학부)
  • Published : 2003.07.01


The mechanical behavior of a commercially pure titanium (CP-Ti) is investigated at high temperature Split Hopkinson Pressure Bar (SHPB) compression test with high strain-rate. Tests are performed over a temperature range from room temperature to 1000$^{\circ}C$ with interval of 200$^{\circ}C$ and a strain-rate range of 1900 ∼ 2000/sec. The true flow stress-true strain relations depending on temperature are achieved in these tests. For construction of constitutive equation from the true flow stress-true strain relation, parameters for the Johnson-Cook constitutive equation is determined. And the modified Johnson-Cook equation is used for investigation of behavior of flow stress in vicinity of recrystalization temperature. The Modified Johnson-Cook constitutive equation is more suitable in expressing the dynamic behavior of a CP-Ti at high temperature, i.e. about recrystalization temperature.


SHPB;Titanium;High Temperature;Strain-rate;Constitutive Equation


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