|
Vol.48, No.6, 477 ~ 489, 2010
|
| Title |
| Quasi-Static and Dynamic Deformation Behavior of STS304- and Ta-fiber-reinforced Zr-based Amorphous Matrix Composites Fabricated by Liquid Pressing Process |
| 허훈 Hoon Huh , 김진성 Jin Sung Kim , 이성학 Sung Hak Lee , 김기종 Ki Jong Kim , 신상용 Sang Yong Shin , 김용지 Yong Jin Kim |
|
|
|
| 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. |
|
|
| Key Words |
| Composites, infiltration, strain rate, impact test, Liquid pressing process |
|
|
 |
|
