Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Quasi-Static and Dynamic Deformation Behavior of STS304- and Ta-fiber-reinforced Zr-based Amorphous Matrix Composites Fabricated by Liquid Pressing Process

액상가압공정으로 제조된 STS304와 Ta 섬유 강화 Zr계 비정질 복합재료의 준정적 및 동적 변형거동

  • Kim, Yongjin (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Shin, Sang Yong (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Kim, Jin Sung (Departement of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Huh, Hoon (Departement of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Ki Jong (Center for Advanced Aerospace Materials, Pohang University of Science and Technology) ;
  • Lee, Sunghak (Center for Advanced Aerospace Materials, Pohang University of Science and Technology)
  • 김용진 (포항공과대학교 항공재료연구센터) ;
  • 신상용 (포항공과대학교 항공재료연구센터) ;
  • 김진성 (한국과학기술원 기계공학과 전산역학설계연구실) ;
  • 허훈 (한국과학기술원 기계공학과 전산역학설계연구실) ;
  • 김기종 (포항공과대학교 항공재료연구센터) ;
  • 이성학 (포항공과대학교 항공재료연구센터)
  • Received : 2009.12.08
  • Published : 2010.06.22
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Abstract

Zr-based amorphous alloy matrix composites reinforced with stainless steel (STS) and tantalum continuous fibers were fabricated without pores or defects by a liquid pressing process, and their quasi-static and dynamic deformation behaviors were investigated by using a universal testing machine and a Split Hopkinson pressure bar, respectively. The quasi-static compressive test results indicated that the fiberreinforced composites showed amaximum strength of about 1050~1300 MPa, and its strength maintained over 700 MPa until reaching astrain of 40%. Under dynamic loading, the maximum stresses of the composites were considerably higher than those under quasi-static loading because of the strain-rate hardening effect, whereas the fracture strains were considerably lower than those under quasi-static loading because of the decreased resistance to fracture. The STS-fiber-reinforced composite showed a greater compressive strength and ductility under dynamic loading than the tantalum-fiber-reinforced composite because of the excellent resistance to fracture of STS fibers.

Keywords

Acknowledgement

Grant : 전단파괴 제어를 통한 고성능 비정질 복합재료 개발

Supported by : 한국기계연구원

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