Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Effect of Microstructures on the Deformation Behavior of Ti-6Al-4V Alloy at Ultra High Strain rate

Ti-6Al-4V합금의 미세조직에 따른 초고속 변형특성

  • 이유환 (포항공과대학교 신소재공학과 항공재료연구센터) ;
  • 이동근 (포항공과대학교 신소재공학과 항공재료연구센터) ;
  • 이성학 (포항공과대학교 신소재공학과 항공재료연구센터) ;
  • 최준홍 (국방과학연구소 1체계 개발본부) ;
  • 허선무 (국방과학연구소 기술연구본부) ;
  • 이종수 (포항공과대학교 신소재공학과 항공재료연구센터)
  • Published : 2002.11.01
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Abstract

In this study, the effect of $\alpha$-phase morphology on the dynamic deformation behavior at ultra high strain rate was investigated by EBW(Explosive Bridge Wire) test. All of tests and analyses were conducted on three typical microstructures of Ti-6Al-4V alloy, i.e. equiaxed, widmanstatten and bimodal microstructures. The spall strength and HEL(Hugoniot Elastic Limit) of the specimens that have the thickness of 2mm and 4mm were highest with the bimodal microstructure. These results were similar with previous study which was performed by dynamic torsion test(Kolsky torsion test).

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References

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