Research on Taylor impact fracture behavior of ZrCuAlNiNb amorphous alloy

Meng, Yuanpei; Guo, Zhiping; Wang, Chuanting; He, Yong; He, Yuehui; Hu, Xuebing

doi:10.1051/jnwpu/20213961296

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…According to the recovered fracture samples, it is found that the fracture surface is not a relatively smooth surface in the height direction, and its fracture surface is uneven. This is because the fracture of the material is a process of damage accumulation, which can be expressed by the combination of macro-micro simulation [38,39].…”

Section: Discussionmentioning

confidence: 99%

The Effect of Surface Electroplating on Fragment Deformation Behavior When Subjected to Contact Blasts

Meng

Wang

et al. 2023

Materials

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Preformed fragments can deform or even fracture when subjected to contact blasts, which might lead to a reduction of the terminal effect. Therefore, to solve this problem, the effect of surface electroplating on the fragment deformation behavior under contact blasts was analyzed. Firstly, blast recovery tests were carried out on uncoated and coated fragments. After the contact blast, the two samples produced different deformation behaviors: the uncoated fragments were fractured, while the coated fragments maintained integrity. The tests were simulated by finite element simulation, and the deformation behavior of the different samples matched well with the test results, which can explain the protective effect of the coating after quantification. In order to further reveal the dynamic behavior involved, detonation wave theory and shock wave transmission theory in solids were used to calculate the pressure amplitude variation at the far-exploding surface of the fragments. The theoretical results showed that the pressure amplitude of the uncoated samples instantly dropped to zero after the shock wave passed through the far-exploding surface, which resulted in the formation of a tensile zone. But the pressure amplitude of the coated samples increased, transforming the tensile zone into the compression zone, thereby preventing the fracture of the fragment near the far-exploding surface, which was consistent with the test and simulated results. The test results, finite element simulations, and theories show that the coating can change the deformation behavior of the fragment and prevent the fracture phenomenon of the fragment. It also prevents the material from missing and a molten state of the fragment in the radial direction by microscopic observation and weight statistics.

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Section: Discussionmentioning

confidence: 99%

The Effect of Surface Electroplating on Fragment Deformation Behavior When Subjected to Contact Blasts

Meng

Wang

et al. 2023

Materials

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“…15(d). This indicates that the brittle-tough transition phenomenon [36,37] occurs at the edge locations of the fragments due to the axial stretching of the shock wave and the radial stress of the surrounding fragments [16] at high strain rates, which is the first to produce fracture. But the phenomenon in the intermediate position is due to the micro-damage aggregation reaching a certain proportion at this time, and the micro-damage aggregation reaching a certain proportion, resulting in the direct fracture of the fragments [13,14].…”

mentioning

confidence: 99%

Effect of surface electroplating on fragment deformation behavior subjected to contact explosion

Meng

wang

et al. 2023

Preprint

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Prefabricated fragments can deform or even fracture subjected to contact explosion. Thus, the surface of the prefabricated fragment was electroplated with Ni, in order to change the fragment deformation behavior. The effect of surface electroplating on the fragment deformation behavior under contact explosion was analyzed. Firstly, explosion recovery experiments were carried out on uncoated and coated fragments, and different lining thicknesses were set for comparison. By observing the recovered samples, the deformation behavior of two kinds of samples was found to change after contact explosion: the uncoated fragments were fractured, while the coated fragments maintained integrity. The lining did not change the fragment deformation behavior but could change the degree of deformation. As the thickness of the lining decreased, the degree of fragmentation compression increased. To study this phenomenon, detonation wave theory and shock wave transmission theory in solids were used to calculate the pressure amplitude variation at the far-exploding surface of the fragments. The pressure amplitude of the uncoated samples instantly dropped to zero after the shock wave passed through the far-exploding surface, which resulted in the formation of tensile zone. But the pressure amplitude of the coated samples increased, which transformed the tensile zone into the compression zone, thereby preventing the fracture of the fragment near the far-exploding surface, which was consistent with the test results. Then, microscopic observation of the circumferential direction of the recovered samples showed that the coatings were better than the lining in preventing "weld melting" and fracture phenomena in the radial direction of the fragments. The test results and theories show that the coating can change the deformation behavior of the fragment and prevent the fracture phenomenon of the fragment. The coating also has better protection performance than the lining against contact explosion.

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Dynamic deformation behavior and constitutive model of a Zr–W alloy

Ma,

Wang,

Guo

et al. 2023

Journal of Applied Physics

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In this paper, a Zr–5W alloy was fabricated via casting. In order to obtain the mechanical properties of the material, quasi-static compression tests at room temperature and split Hopkinson pressure bar tests at various temperatures were carried out. The x-ray diffraction result showed that the main components of the alloy were αZr and W2Zr, where αZr is the matrix and W2Zr is the reinforcement. The metallographic characterization results showed that there were two main forms of W2Zr in the material, namely, large particle boundary and small diffuse submicrometer precipitates. The reinforcements of both distributions have the effect of increasing the strength of the material, but the small submicrometer W2Zr precipitates would cause microcrack nucleation during the late plastic deformation stage, resulting in damage softening. In order to make theoretical calculations of the mechanical properties of materials, the Johnson–Cook (JC) constitutive model and Zerilli–Armstrong (ZAM) constitutive model of the material were obtained. It was found that the JC constitutive model had poor consistency in describing material properties. Although the consistency of the ZAM constitutive model was higher than that of the JC constitutive model, it still had obvious shortcomings. Combined with the deformation mechanism of the alloy, a modified constitutive relation was established by adding damage softening terms based on the hexagonal close-packed metal constitutive model inferred by the kinetics of heat-activated dislocations. The relative error results of all working conditions show that the correlation consistency of the improved constitutive model in this paper is significantly better than that of JC constitutive and ZAM constitutive.

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Research on Taylor impact fracture behavior of ZrCuAlNiNb amorphous alloy

Cited by 3 publications

References 11 publications

The Effect of Surface Electroplating on Fragment Deformation Behavior When Subjected to Contact Blasts

The Effect of Surface Electroplating on Fragment Deformation Behavior When Subjected to Contact Blasts

Effect of surface electroplating on fragment deformation behavior subjected to contact explosion

Dynamic deformation behavior and constitutive model of a Zr–W alloy

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