The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

Chen, Chun-Liang; Sutrisna,

doi:10.3390/met9020111

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…A high temperature tensile test in the range of 25–1100 °C on a fine grained 93W–4.9Ni–2.1Fe–0.03Y alloy showed a superior ultimate tensile strength to the test on the coarse-grained alloy of 93W–4.9Ni–2.1Fe [ 83 ]. A model alloy of W–Ni–Fe-Mo-Co was chosen by Chen et al [ 84 ] to investigate the mechanical properties of the sintered alloy with and without yttrium oxide dispersion. The dispersed alloy showed a relatively high hardness of 430 HV, giving a 17% increase in hardness compared with the undispersed alloy.…”

Section: Effect Of Oxide Dispersions On Whamentioning

confidence: 99%

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 Oxide Dispersions On Whamentioning

confidence: 99%

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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Investigation of Microstructure, Mechanical, and Tribological Behavior of Nano‐Y₂O₃, TiO₂, ZrO₂‐Dispersed W–Ni–Nb–Mo–Zr Alloys Fabricated by Spark Plasma Sintering

Khan,

Patra,

Chaira

et al. 2024

Adv Eng Mater

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W–Ni–Nb–Mo–Zr alloys with 1.0 weight% (wt%) Y2O3 (alloy A), TiO2 (alloy B), ZrO2 (alloy C) dispersion synthesized by mechanical alloying for 20 h have been subjected to spark plasma sintering at 1150 °C with 65 MPa pressure and 5 min holding time. X‐ray diffraction analysis reveals the occurrence of intermetallics (W2Zr, NiNb, Ni10Zr7, MoNi), which improves the strength of the alloys. Field‐emission scanning electron microscopy analysis shows that the grain size of alloy A is less compared to alloy B and C. Energy‐dispersive spectroscopy reveals the presence of oxides at the matrix interface. Maximum % relative sintered density, ultrahigh hardness, excellent compressive strength, % compressive strain at the maximum compressive load of 99.5%, 20.42 GPa of 2.55 GPa, 9.7%, respectively, have been recorded for alloy A. Maximum texture intensity of 1.5 is recorded for alloy A which supports the superior mechanical properties. The specific wear rate of alloy A is around 2.78 times less compared to alloy C. The crystal structure transformation of ZrO2 from monoclinic to tetragonal after sintering deteriorates the mechanical properties and wear resistance in alloy C. The article also reports the operative wear mechanism in the studied oxide dispersion‐strengthened alloy.

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Effect of High‐Energy Ball‐Milling Duration on Densification, Microstructure, and Mechanical Properties of Cr₂AlC‐Dispersed 90W‐6Ni‐2Fe‐2Co Heavy Alloys

Adhikari,

Sengupta,

Panigrahi

et al. 2024

Adv Eng Mater

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This study focuses on the role of Cr2AlC‐MAX phase incorporation on the density, phase composition, microstructure, and mechanical properties of 90W‐6Ni‐2Fe‐2Co heavy alloy. The blended powders are ball milled in a high‐energy ball mill up to 40 h, compacted, and sintered at 1500 °C. The mechanical alloying results in a refined microstructure with uniform distribution of W, matrix, and dispersoids. The minimum grain size of W (14.7 ± 5.6 μm) is obtained in 2 wt% Cr2AlC‐containing tungsten alloy prepared from 40 h‐milled powders. Among the investigated alloys, 1 wt% Cr2AlC‐incorporated samples exhibit maximum compressive stress (2026 MPa). The incorporation of fine Cr2AlC as dispersoids is found to be beneficial in improving the strength as well as ductility of WHAs. The best combination of yield strength (553.4 MPa), ultimate tensile strength (1011.2 MPa), ductility (11.4%), and product of strength and elongation (11.5 GPa%) is found in alloy prepared from 40 h milled 90W‐4.8Ni‐1.6Fe‐1.6Co‐2Cr2AlC. The improved tensile strength in Cr2AlC‐incorporated WHAs may be attributed to the combined effect of grain size refinement and dispersion strengthening. Overall, the combination of ball milling and Cr2AlC incorporation in tungsten‐heavy alloys is found to be effective in developing a novel W‐based alloy system for strategic applications.

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The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

Cited by 8 publications

References 17 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

Investigation of Microstructure, Mechanical, and Tribological Behavior of Nano‐Y₂O₃, TiO₂, ZrO₂‐Dispersed W–Ni–Nb–Mo–Zr Alloys Fabricated by Spark Plasma Sintering

Effect of High‐Energy Ball‐Milling Duration on Densification, Microstructure, and Mechanical Properties of Cr₂AlC‐Dispersed 90W‐6Ni‐2Fe‐2Co Heavy Alloys

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The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

Cited by 8 publications

References 17 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

Investigation of Microstructure, Mechanical, and Tribological Behavior of Nano‐Y2O3, TiO2, ZrO2‐Dispersed W–Ni–Nb–Mo–Zr Alloys Fabricated by Spark Plasma Sintering

Effect of High‐Energy Ball‐Milling Duration on Densification, Microstructure, and Mechanical Properties of Cr2AlC‐Dispersed 90W‐6Ni‐2Fe‐2Co Heavy Alloys

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Investigation of Microstructure, Mechanical, and Tribological Behavior of Nano‐Y₂O₃, TiO₂, ZrO₂‐Dispersed W–Ni–Nb–Mo–Zr Alloys Fabricated by Spark Plasma Sintering

Effect of High‐Energy Ball‐Milling Duration on Densification, Microstructure, and Mechanical Properties of Cr₂AlC‐Dispersed 90W‐6Ni‐2Fe‐2Co Heavy Alloys