In-situ Test Research on Anisotropic Compressive Mechanical Behavior of Fiber Reinforced Bulk Metallic Glass Matrix Composite

doi:10.12382/bgxb.2023.0586

Abstract

Abstract:

Tungsten fiber reinforced zirconium-based bulk Metallic Glass matrix composite (WF/Zr-MG) is widely used in the field of kinetic energy penetration due to their high density, high strength and high adiabatic shear sensitivity. The static and dynamic micro-in-situ compression test platforms are set up to accurately characterize the influence of different armor-piercing attitudes on the armor-piercing properties of composites during forward and oblique armor-piercing. The compressive mechanical behaviors of WF/Zr-MGs with 6 different fiber arrangement angles of 0°, 10°, 25°, 45°, 65° and 90° are studied by in-situ mechanical properties test and microscopic image analysis. The change of the failure strength of the composite with the arrangement angle of fibers is obtained. According to the test results, the failure strength envelope of WF/Zr-MG considering strain rate and fiber arrangement angle is defined. It provides a reference for a safe stress state range of materials under different armor-piercing attitudes and loading rates, which is of great significance for the development of armor-piercing materials.

Key words: WF/Zr-MG composite, in-situ test, microanalysis, failure mechanism

CLC Number:

TB331

LI Yingjie, LI Jicheng, LI Ning, GUO Yazhou. In-situ Test Research on Anisotropic Compressive Mechanical Behavior of Fiber Reinforced Bulk Metallic Glass Matrix Composite[J]. Acta Armamentarii, 2024, 45(9): 2982-2992.

Figures/Tables 19

Fig.1 Arrangement angle (θf) of fibers in the specimen

Fig.2 Polishing surface of specimen under microscope (θf =10°)

Fig.3 Schematic diagram of quasi-static in-situ test system

Fig.4 Schematic diagram of dynamic in-situ test system

Table 1 Dynamic test strain rate design for six specimens

试样角度	动态实验应变率/s^-1
试样角度	500	1 000	2 000	3 000
0°	×	√	√	√
10°	×	√	√	√
25°	√	√	√	×
45°	√	√	√	×
65°	√	√	√	×
90°	√	√	√	×

Fig.5 Collection of stress-strain curves for specimens at different angles at 10-3s-1 and 10-2s-1strain rates

Fig.6 Collection of stress-strain curves for specimens at different angles at 1000s-1 and 2000s-1 strain rates

Fig.7 Quasi-static (10-3s-1 strain rate) in-situ test results of 0° specimen

Fig.8 Quasi-static (10-2s-1 strain rate) in-situ observation of 25° specimen

Fig.9 Quasi-static (10-3s-1 strain rate) in-situ observation of 90° specimen

Fig.10 Quasi-static (10-2s-1 strain rate) in-situ observation of 90° specimen

Fig.11 Failure process of 90° specimen under dynamic loading (103s-1 strain rate)

Fig.12 Failure process of 0° specimen under dynamic loading (103s-1 strain rate)

Fig.13 Fracture of specimens under dynamic loading

Fig.14 DIC results of 90° specimen at 10-2s-1 strain rate

Fig.15 DIC results of 90° specimen at 103s-1 strain rate

Fig.16 Relationship between failure stress and fiber arrangement angle of WF/Zr-MG composite

Fig.17 Schematic diagram of the mechanism of shear band propagation in the resistance matrix of fibers at differentθf

Fig.18 Failure envelope of WF/Zr-MG composites

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