Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Ballistic Properties of Zr-based Amorphous Alloy Surface Composites Fabricated by High-Energy Electron-Beam Irradiation

고에너지 전자빔 투사방법으로 제조된 Zr계 비정질 합금 표면복합재료의 탄도충격 성능

  • Do, Jeonghyeon (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Jeon, Changwoo (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Nam, Duk-Hyun (Material Research Team, Hyundai Motors Technical Research Laboratory) ;
  • Kim, Choongnyun Paul (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Song, Young Buem (Agency for Defense Development) ;
  • Lee, Sunghak (Center for Advanced Aerospace Materials, Pohang University of Science and Technology)
  • 도정현 (포항공과대학교 항공재료연구센터) ;
  • 전창우 (포항공과대학교 항공재료연구센터) ;
  • 남덕현 (현대자동차 기술연구소 금속재료연구팀) ;
  • 김충년 (포항공과대학교 항공재료연구센터) ;
  • 송영범 (국방과학연구소) ;
  • 이성학 (포항공과대학교 항공재료연구센터)
  • Received : 2010.03.29
  • Published : 2010.12.25
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Abstract

The objective of this study is to investigate the ballistic properties of Zr-based amorphous alloy surface composites fabricated by high-energy electron-beam irradiation. The mixture of Zr-based amorphous powders and $LiF+MgF_2$ flux powders was deposited on a pure Ti substrate, and then an electron beam irradiated this powder mixture to fabricate a one-layer surface composite. A four-layer surface composite, in which the composite layer thickness was larger than 3 mm, was also fabricated by irradiating the deposited powder mixture by an electron beam three times on the one-layer surface composite. The microstructural analysis results indicated that a small amount of fine crystalline particles were homogeneously distributed in the amorphous matrix of the surface composite layer. According to the ballistic impact test results, the surface composite layers effectively blocked a fast traveling projectile, while many cracks were formed at the composite layers, and thus the surface composite plates were not perforated. The surface composite layer containing ductile ${\beta}$ dendritic phases showed a better ballistic performance than the one without dendrites because dendritic phases hindered the propagation of shear bands or cracks.

Keywords

Acknowledgement

Supported by : 국방과학연구소

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