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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 Precess
|저자명||Yongjin Kim Sang Yong Shin Jin Sung Kim Hoon Huh Ki Jong Kim Sunghak Lee|
|Journal||Kor. J. Met. Mater.|
Zr-based amorphous alloy matrix composites reinforced with stainless steel (STS) and tantalum continous 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 fiber-reinforced composites showed amaximum strength of about 1050~1300MPa, and its strength maintained over 700MPa 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.