Swaging of liquid phase sintered 90W–7Ni–3Fe tungsten heavy alloy

Çalışkan, Nihal; Durlu, Nuri; Bor, Şakir

doi:10.1016/j.ijrmhm.2012.10.001

Cited by 53 publications

(13 citation statements)

References 14 publications

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“…It has been shown, for example, that if small powders are used even higher strength can be obtained with LMD, while still retaining a uniform elongation of ~5% for a 75W-17.5Ni-7.5Fe alloy [27]. Compared to the reported as-sintered LPS samples [6,7,13,[37][38][39][40][41][42][43][44], LMD provides a higher tensile strength. Note that some of the LPS samples have higher strengths than the present reference LPS sample.…”

Section: Lmd Processingmentioning

confidence: 99%

“…The high sintering temperature as well as the slow heating (<1 K/s) and cooling rates (<10 K/s) of the LPS process, however, usually result in significant reprecipitation and growth of W particles/grains [5]. High hardness and high strength are thus obtained only after microstructure refinement by thermomechanical treatments, such as swaging [6][7][8], which prevents net-shape fabrication of WHAs using LPS.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and strengthening mechanisms of 90W–7Ni–3Fe alloys prepared using laser melting deposition

Wang

Yang

et al. 2020

Journal of Alloys and Compounds

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Section: Lmd Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and strengthening mechanisms of 90W–7Ni–3Fe alloys prepared using laser melting deposition

Wang

Yang

et al. 2020

Journal of Alloys and Compounds

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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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“…Tungsten heavy alloys (WHA) are a two-phase metal matrix composite, where bcc structured tungsten is dispersed in the Ni-based fcc binder matrix [31][32][33]. The structure comprises of interconnected tungsten grains with interpenetrating matrix phase [34]. Owing to their higher density, better strength and toughness properties, they found their application in aerospace as counterbalance and in military applications such as kinetic energy penetrators [35].…”

Section: Introductionmentioning

confidence: 99%

“…These alloys are developed by sintering the powder mixture with >90 wt % of tungsten with low melting point elements such as Co, Cu, Fe, Ni, and so forth. [34][35][36][37]. Currently, WHA has been effectively produced by different processing routes like conventional liquid phase sintering, microwave sintering and spark plasma sintering [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Tungsten Matrix Composite Reinforced with CoCrFeMnNi High-Entropy Alloy: Impact of Processing Routes on Microstructure and Mechanical Properties

Satyanarayana

Sokkalingam

Jena

et al. 2019

Metals

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Tungsten heavy alloy composite was developed by using novel CoCrFeMnNi high-entropy alloy as the binder/reinforcement phase. Elemental tungsten (W) powder and mechanically alloyed CoCrFeMnNi high-entropy alloy were mixed gently in high energy ball mill and consolidated using different sintering process with varying heating rate (in trend of conventional sintering < microwave sintering < spark plasma sintering). Mechanically alloyed CoCrFeMnNi high-entropy alloy have shown a predominant face-centered cubic (fcc) phase with minor Cr-rich σ-phase. Consolidated tungsten heavy high-entropy alloys (WHHEA) composites reveal the presence of Cr–Mn-rich oxide phase in addition to W-grains and high-entropy alloys (HEA) phase. An increase in heating rate restricts the tungsten grain growth with reduces the volume fraction of the Cr–Mn-rich phase. Finally, spark plasma sintering with a higher heating rate and shorter sintering time has revealed higher compressive strength (~2041 MPa) than the other two competitors (microwave sintering: ~1962 MPa and conventional sintering: ~1758 MPa), which may be attributed to finer W-grains and reduced fraction of Cr–Mn rich oxide phase.

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Swaging of liquid phase sintered 90W–7Ni–3Fe tungsten heavy alloy

Cited by 53 publications

References 14 publications

Microstructure and strengthening mechanisms of 90W–7Ni–3Fe alloys prepared using laser melting deposition

Microstructure and strengthening mechanisms of 90W–7Ni–3Fe alloys prepared using laser melting deposition

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

Tungsten Matrix Composite Reinforced with CoCrFeMnNi High-Entropy Alloy: Impact of Processing Routes on Microstructure and Mechanical Properties

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