Mechanical properties study of W/TiN/Ta system multilayers

Zhang, Ying; Xu, Guangwu; Wang, Yan; Zhang, Cheng; Feng, Shuaijie; Suo, Jinping

doi:10.1016/j.jallcom.2017.07.115

Cited by 17 publications

(8 citation statements)

References 14 publications

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“…The performance advantages of Ta are high toughness, high melting point, low tritium retention, and high radiation resistance [6,7]. The coefficient of thermal expansion (CTE) difference between W and Ta is minimal [8,9]. Therefore, the W/Ta composite material can be designed to enhance the toughness of W and combine the respective characteristics of the two materials to be applied to small parts [10,11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution and mechanical property of W/Ta bimetal foil produced by a high wave impedance explosive welding technology

Tian

Yang

et al. 2022

Int J Adv Manuf Technol

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Welding of dissimilar metal foils is challenging, especially between high melting temperature and brittle metals. In this study, the direct welding of tungsten foil and tantalum foil was achieved using metal protection plates in an explosive welded configuration. The microstructure, chemical composition, and hardness distribution in the corresponding microscopic regions of the W/Ta interface were characterized by electron backscattered diffraction (EBSD), energy-dispersive spectroscopy (EDS), and nano-indentation. The W/Ta interface formed a wavy bonding interface, and a large number of refined grains smaller than 1 µm were created at the interface. Different melting zones were investigated employed EBSD and nano-indentation to understand the vortex structure's evolution mechanism. It was found that the formation of holes in the melting zone was mainly due to the cooling shrinkage after intense jet agitation. Besides, the more intense jet promotes recovery and recrystallization. However, the stronger intrusion of the jet causes higher nano-hardness in the melt zone, which is attributed to the effect of the jet on the heterogeneous microstructure. Mechanical tests show that the tensile strength of W/Ta bimetal foil exceeds 850 MPa, and there is no crack propagation on the surface of the metal foil. The analysis of welding parameters and material properties revealed that increasing the material temperature during the explosive welding process and providing high-impedance material confinement are the main ways to solve the problem of explosive welding of brittle materials.

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Section: Introductionmentioning

confidence: 99%

Microstructure evolution and mechanical property of W/Ta bimetal foil produced by a high wave impedance explosive welding technology

Tian

Yang

et al. 2022

Int J Adv Manuf Technol

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“…Even so, service failures remain a relevant topic to isostructured multilayers [7][8][9] . On account of commonly being structured with repeated bilayers, vulnerabilities encountered in a certain period tend to be replicated to the others since deterioration mechanisms are analogously materialized along thickness.…”

Section: Introductionmentioning

confidence: 99%

“…In the last years, several combinations of materials have been used in the structuring of multilayers [1][2][3][4][7][8]14 , among which chromium (Cr) and titanium nitride (TiN) have shown expressive results. Nam et al 14 deposited a TiN/Cr bilayer by magnetron sputtering on 316L steel and recorded a decrease in substrate corrosion current density from 115.650 µA/cm 2 to 1.201 µA/cm 2 , with 98.96% protection efficiency for a bilayer TiN/Cr ~ 300 nm/700 nm.…”

Section: Introductionmentioning

confidence: 99%

Structure, mechanical properties and oxidation resistance of iso and non-iso architected TiN/Cr multilayers coatings deposited by magnetron sputtering

et al. 2021

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“…Our team has been previously researching laminated W/Ta system for several years [26,27]. We found that Ta has a good toughening effect on W. Moreover, when a TiN transition layer is added between tungsten and tantalum.…”

Section: Introductionmentioning

confidence: 99%

Effect of Transition Layer on Properties of Tungsten-Tantalum (W-Ta) Laminated Composite

Yan

Suo

2020

Metals

Self Cite

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Tungsten has many attractive properties, but its brittleness limits its application. Our team has found that the brittleness of tungsten can be greatly improved by combining the brittle tungsten with tantalum. Furthermore, we found that if a suitable transition layer is added between tungsten and tantalum, the properties of the composite will be further improved. In this paper, we studied the effect of different transition layers on the properties of W-Ta laminated composite to explore a suitable transition layer, which can effectively improve the toughness of the composite and solve the problem of tungsten application. We have prepared four kinds of W-Ta laminated composites with Ni, Ti, Nb, and Mo as transition layers. Ta-W laminated composites were prepared by stacking layers with Ta, transition layer, W alternately and sintered by spark plasma sintering (SPS). The tensile and three-point bending tests were carried to compare the mechanical properties. The tensile fracture morphology and three-point bending crack distribution were observed by SEM. In addition, the diffusion of elements in the transition layer and the influence of element diffusion on the tungsten structure were also studied to clarify the toughening mechanism. The results show that Nb is a satisfying transition layer, which not only improves the strength of W-Ta laminated composite, but also improves the toughness. The tensile test of W/Nb/Ta laminated composite shows a typical plastic fracture mode with an elongation of 13%. Three-point bending test also shows high strength and good toughness. In addition, Voigt model was used to predict the elastic modulus of W-Ta laminated composites and compared with the experimental results.

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Mechanical properties study of W/TiN/Ta system multilayers

Cited by 17 publications

References 14 publications

Microstructure evolution and mechanical property of W/Ta bimetal foil produced by a high wave impedance explosive welding technology

Microstructure evolution and mechanical property of W/Ta bimetal foil produced by a high wave impedance explosive welding technology

Structure, mechanical properties and oxidation resistance of iso and non-iso architected TiN/Cr multilayers coatings deposited by magnetron sputtering

Effect of Transition Layer on Properties of Tungsten-Tantalum (W-Ta) Laminated Composite

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