Refractory metal alloying: A new method for improving mechanical properties of tungsten heavy alloys

Kiran, U. Ravi; Panchal, Ashutosh; Kumar, M. Prem; Sankaranarayana, M.; Rao, G. Appa; Nandy, T.K.

doi:10.1016/j.jallcom.2017.03.174

Cited by 59 publications

(8 citation statements)

References 34 publications

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“…The relative density and the tensile strength of the alloy showed an increasing trend with an increase in the amount of Re in the alloy as shown in Figure 1. The elongation was reduced as observed in the previous investigation [51]. However, the amount of reduction was only 15% with an increase in Re of up to 0.6 wt%.…”

Section: Effect Of Rhenium and Tantalum On W-ni-fesupporting

confidence: 83%

“…However, the matrix volume fraction and tungsten dissolution in the matrix phase did not change significantly. However, the contiguity was reduced to 0.27 from 0.36 [51]. The microstructural parameters are shown in Table 1.…”

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

“…If some of the rhenium particles are undissolved, they settle around the tungsten grains, leading to a decline in the properties of the alloy. High-energy milling of alloy powders was found to reduce the inhomogeneity in the alloy [49,51]. A novel method of producing the alloy was used by Ravi Kiran et al [51].…”

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

“…High-energy milling of alloy powders was found to reduce the inhomogeneity in the alloy [49,51]. A novel method of producing the alloy was used by Ravi Kiran et al [51]. The tungsten powder was mixed with 1 wt% of rhenium particles in a ball mill for 5 h. The milled powders were then mixed with nickel and iron particles and again milled for 48 h. The composition considered for the analysis was 89W-7Ni-3Fe-1Re.…”

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

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Effect of Rare Earth Metals (Y, La) and Refractory Metals (Mo, Ta, Re) to Improve the Mechanical Properties of W–Ni–Fe Alloy—A Review

et al. 2021

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Tungsten heavy alloys are two-phase metal matrix composites that include W–Ni–Fe and W–Ni–Cu. The significant feature of these alloys is their ability to acquire both strength and ductility. In order to improve the mechanical properties of the basic alloy and to limit or avoid the need for post-processing techniques, other elements are doped with the alloy and performance studies are carried out. This work focuses on the developments through the years in improving the performance of the classical tungsten heavy alloy of W–Ni–Fe through doping of other elements. The influence of the percentage addition of rare earth elements of yttrium, lanthanum, and their oxides and refractory metals such as rhenium, tantalum, and molybdenum on the mechanical properties of the heavy alloy is critically analyzed. Based on the microstructural and property evaluation, the effects of adding the elements at various proportions are discussed. The addition of molybdenum and rhenium to the heavy alloy gives good strength and ductility. The oxides of yttrium, when added in a small quantity, help to reduce the tungsten’s grain size and obtain good tensile and compressive strengths at high temperatures.

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Section: Effect Of Rhenium and Tantalum On W-ni-fesupporting

confidence: 83%

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

Section: Effect Of Rhenium and Tantalum On W-ni-fementioning

confidence: 99%

See 2 more Smart Citations

Effect of Rare Earth Metals (Y, La) and Refractory Metals (Mo, Ta, Re) to Improve the Mechanical Properties of W–Ni–Fe Alloy—A Review

et al. 2021

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“…In previous studies, the study of tungsten alloys has focused on the addition of alloying elements [6,7], grain refinement [8][9][10][11] and plastic deformation [12][13][14]. However, there have been relatively few studies on the surface modification of tungsten alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of vacuum carburizing on surface properties and microstructure of a tungsten heavy alloy

Liang

et al. 2020

Mater. Res. Express

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Vacuum carburizing of the R2M tungsten alloy was carried out to obtain a carburized layer that improves the surface properties. The effects of various carburizing temperatures and times on the structure and hardness were studied by Optical microscopy(OM), x-ray Diffraction(XRD) and Scanning electron microscope(SEM). In this work, the microstructure of the carburized layer, the relative content of the surface layer, the depth of the layer and the microhardness of the carburized sample were studied. The results show that the microstructure exhibited three layers from the surface to the bulk of the sample after carburizing. The outside layer comprised a 40∼60 μm deep WC carburized layer. The hardness of the surface layer (396 HV) was significantly higher than that of the substrate (282 HV). As the carburizing temperature and time increased, the WC and W content of the surface layer of the sample gradually increased, and the depth of the carburized outer layer increased.

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Friction welding of tungsten composite core with AA5754 ballistic cup

Goroch

Gulbinowicz

Bednarczyk

2023

Continuum Mech. Thermodyn.

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This paper is a study of mechanical properties and microstructure of rotary friction welded tungsten heavy alloy with aluminum alloy (AA). A plastic deformation is visible on AA side. Effects of friction time (FT) and friction pressure (FP) on the ultimate tensile strength (UTS) were studied by plotting graphs. The UTS of joints increases with increasing FP and FT and then decreases after reaching the maximum value. The fracture proceeds through the cleavage planes at the interface. Scanning electron microscopy for investigation of the fracture morphology and phase transformations taking place during friction welding process was used. Chemical compositions of the interfaces of the welded joints were determined by using energy-dispersive X-ray spectroscopy (EDS). EDS analyses across the interface of tungsten and nickel have not confirmed the diffusion to AA side. Microstructure of friction welds consisted of equiaxed grains formed due to dynamic recrystallization and coarse grains in the periphery region on AA side.

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Refractory metal alloying: A new method for improving mechanical properties of tungsten heavy alloys

Cited by 59 publications

References 34 publications

Effect of Rare Earth Metals (Y, La) and Refractory Metals (Mo, Ta, Re) to Improve the Mechanical Properties of W–Ni–Fe Alloy—A Review

Effect of Rare Earth Metals (Y, La) and Refractory Metals (Mo, Ta, Re) to Improve the Mechanical Properties of W–Ni–Fe Alloy—A Review

Effect of vacuum carburizing on surface properties and microstructure of a tungsten heavy alloy

Friction welding of tungsten composite core with AA5754 ballistic cup

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