Free volume evolution dominated by glass forming ability determining mechanical performance in Zr Ti65-Be27.5Cu7.5 metallic glasses

Liu, Xiangkui; Kong, Jian; Song, Xinxiang; Feng, Shuai; Zhang, Zibo; Yang, Yang; Wang, Tianchi

doi:10.1016/j.msea.2021.140764

Cited by 13 publications

(2 citation statements)

References 59 publications

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“…The difference is in the relationship between particle set G' and stagnation point S. Studies have shown that amorphous alloy materials have long-range disordered and short-range ordered microstructures and exhibit no dislocation slip behavior compared with crystalline materials 32 . The materials generally exhibit typical brittle fracture characteristics under high strain rates [33][34][35][36] , with a low shear strength. Vit1 is more prone to fracture than Zr and moves forward to create a large OS distance, as shown in Fig.…”

Section: Comparative Discussionmentioning

confidence: 99%

Research on non-cohesive jet formed by Zr-based amorphous alloys

Shi

Huang

et al. 2023

Sci Rep

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The shaped charge jet formation of a Zr-based amorphous alloy and the applicability of different numerical algorithms to describe the jet formed were experimentally and numerically investigated. X-ray experiments were performed to study jet characteristics. The numerical results for the Zr-based amorphous alloy jet formed via the Euler and smooth particle hydrodynamics (SPH) algorithms were compared and analyzed using the Autodyn hydrocode. Particle motion was examined based on material properties. The Zr-based amorphous alloy formed a noncohesive jet driven by an 8701 explosive. Both the Euler and SPH algorithms achieved high accuracy for the determination of jet velocity. When the improved Johnson-Holmquist constitutive model (JH-2) was used, numerical results confirmed the model’s suitability for the Zr-based amorphous alloy. The Euler algorithm effectively reflected jet shape within a short computing time, whereas the SPH algorithm was highly suitable for showing the shape of the jet tail within a long computing time. In the 3D Euler model, the flared jet mouth indicated radial particle dispersion; however, in the 2D model, particle dispersion in the head was directly observed by using the JH-2 material model. The brittle fracture of the material reduced the proportion of particles near the liner apex forming a jet. Furthermore, a new method in which stagnation pressure was used to predict jet formation and its coherence was proposed since the collapse angle was difficult to obtain.

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Section: Comparative Discussionmentioning

confidence: 99%

Research on non-cohesive jet formed by Zr-based amorphous alloys

Shi

Huang

et al. 2023

Sci Rep

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“…Compared with crystalline alloy, amorphous alloy has the characteristics of high strength, high hardness, high resistance, corrosion resistance, and wear resistance; as such, it has broad application prospects in many fields such as machinery, electronics, chemical industry, and national defense. In recent years, from the microscopic perspective, researchers have gradually revealed the propagation characteristics and mechanical relaxation mechanism of shear bands during the deformation of amorphous alloy materials [22][23][24]. Studies on the mechanical properties of Zr-based amorphous alloys show that temperature [25,26], strain rate [27][28][29], and component elements [30,31] affect the dynamic mechanical properties of amorphous alloys.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Zr‐Based Amorphous Alloy as a Shaped Charge Liner

Shi

Huang

2022

Propellants Explo Pyrotec

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This study aimed to investigate the mechanical properties of Zr-based amorphous alloy at high strain rates and its use as a shaped charge liner. A split Hopkinson pressure bar (SHPB) was used to carry out dynamic mechanical performance tests, and a scanning electron microscope (SEM) was used to observe the fracture morphology of the test piece. The X-ray test of the jet formation and the static penetration test of the Zr-based amorphous alloy jet were performed. It was found that the amorphous alloy material exhibits typical brittle fracture characteristics under high strain-rate compression. As the strain rate increases, molten droplet-like structures appear in the frac-ture morphology, and the melting area is proportional to the strain rate. The Zr-based amorphous alloy liner forms a non-cohesive jet driven by explosive explosion. The actual projection angle of the liner is slightly larger than the theoretical value of Taylor's projection angle because of the unique mechanical properties and fracture mechanism, while the collapse angle is slightly smaller. Compared with copper jet penetrating concrete, the aperture of Zr-based amorphous alloy jet is increased by 58 % and the caving volume is increased by 32 times. The results provide reference for the application of Zr-based amorphous alloy in the field of shaped charge liner.

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