Anisotropic dynamic mechanical response of tungsten fiber/Zr-based bulk metallic glass composites. (5th March 2016)

• Record Type: Journal Article
• Authors: Wang, B.P.; Yu, B.Q.; Fan, Q.B.; Liang, J.Y.; Wang, L.; Xue, Y.F.; Zhang, H.F.; Fu, H.M.
• Is Part Of: Materials & design. Volume 93(2016)
• Page Start: 485
• Page End: 493
• Publication Date: 2016-03-05
• Subjects: W fiber -- Bulk metallic glass (BMG) -- Composite -- Finite element method (FEM) -- Anisotropic mechanical behavior -- Dynamic compression; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2016.01.005
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: The anisotropic dynamic mechanical behavior of the W fiber/Zr-based bulk metallic glass composites (Wf /BMGCs) with different W fiber orientations ( θ f ) were investigated by split Hopkinson pressure bar (SHPB) and finite element method (FEM). The composites exhibited the most excellent mechanical properties at θ f of 0° while the poorest at θ f of 45°. The composites failed by longitudinal splitting at θ f of 0°, shearing at θ f of 45°, a mixture of shearing and splitting during 0° < θ f < 45° or 45° < θ f < 90°, and a mixture of shearing and transverse splitting at θ f of 90°. Strain rate sensitivity of the composites also varied with θ f, exhibiting positive strain rate sensitivity at θ f of 0°, 15°, 60°, and 75° ranging from the strain rate of 10 − 3 to 2.1 × 10 3 s − 1, positive strain rate sensitivity with the strain rate ranging from 10 − 3 to 10 − 2 s − 1 but negative strain rate sensitivity from 10 − 2 to 2.1 × 10 3 s − 1 at θ f of 30° and 90°, and even strain rate insensitivity at θ f of 45°. Graphical abstract: Highlights: The W fiber orientation ( θ f ) had great effect on the dynamic mechanical behavior. The composites exhibited the most excellent mechanical properties at θ f of 0°. The composites exhibited different failure modes when θ f ranged from 0° to 90°. The composites exhibited inconsistent strain rate sensitivity with different θ f .