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Ti-6Al-4V 합금의 동적변형특성과 탄도충격성능  :  1. 초고속 폭발충격 특성 1. Ultra-high-speed Exploding Properties = Dynamic Deformation and Ballistic Properties of Ti-6Al-4V Alloy

제어번호 : 40123996

저자명 : 이유환 ,이동근 ,이성학 ,이종수 ,최준홍 ,허선무

학술지명 : 대한금속·재료학회지(Korean Journal of Metals and Materials)

권호사항 : Vol.41 No.10 [2003]

발행처 : 대한금속재료학회

발행처 URL : http://www.kim.or.kr

자료유형 : 학술저널

수록면 : 645-651(7쪽)

언어 : Korean

발행년도 : 2003년

KDC : 436

주제어 : Bimodal microstructure ,Equiaxed microstructure ,Exploding bridge wire test ,Spall strength ,Hugoniot elastic limit

소장기관 :

  • 영남대학교 과학도서관

판매처 : 한국학술정보 한국학술정보 에서 제공하는 논문입니다.

  • 초록
    • The effects of microstructural morphology on ultra-high-speed exploding properties of Ti-6Al-4V alloy were investigated in this study. Exploding bridge wire (EBW) test was conducted on equiaxed and bimodal microstructures, which were processed by different heat treatments. From the test, moving velocity of free surface vs time profiles were obtained to measure strength at Hugoniot elastic limit (HEL) and spall strength and to subsequently predict ballistic mass efficiency. The EBW results indicated that impact resistance of the bimodal microstructure was better than that of the equiaxed microstructure when the measured strength at HEL and spall strength were considered. It was also learned from the observation of fractured EBW specimens that fracture occurred by the initiation and propagation of long cracks in the equiaxed microstructure, whereas a number of microcracks were formed and connected each other in a zig-zag pattern to reduce the driving force for crack propagation in the bimodal microstructure. Since the EBW test helped experimentally estimate ultra-high-speed deformation and fracture behavior, it could be effectively used for the prediction of ballistic impact performance.
  • 목차
    • Abstract
    • 1. 서론
    • 2. 실험 방법
    • 3. 실험 결과 및 고찰
    • 4. 결론
    • 후기
    • REFERENCES