On the flow and work hardening behavior of tungsten heavy alloy 92W-5.5Ni-2.5Fe

Panchal, Ashutosh; Reddy, K. Venugopal; Azeem, P. Abdul; Nandy, T.K.; Singh, Anurag

doi:10.1016/j.ijrmhm.2020.105203

Cited by 11 publications

(3 citation statements)

References 29 publications

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“…A two slope behaviour is seen in the heat treated condition. This has been explained in the work carried out by Panchal et al 30 .While the lower slope corresponds to the deformation of the matrix phase, the higher slope is attributed to the possible deformation of the two phase aggregate. This distinction is not seen in the swaged samples where both matrix and W has been hardened by swaging deformation and they seem to deform together right since the onset of macroscopic plastic deformation.…”

Section: Tensile and Impact Propertiesmentioning

confidence: 78%

Microstructure and Mechanical Properties of Tungsten Heavy Alloy Prepared Using Tungsten Metal Powder Produced from Heavy Alloy Scrap

Kiran,

Panchal,

Kamal

et al. 2023

Def. Sc. J.

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Tungsten metal powder, using a hydrometallurgical route, was extracted from tungsten heavy alloy scrap that was generated during machining of penetrator cores for the manufacture of Fin Stabilised Armour Piercing Discarding Sabot (FSAPDS). The powder was subjected to extensive characterisation that included physical property evaluation and analysis of the alloy chemistry in order to assess its suitability for the preparation of tungsten heavy alloys with enhanced mechanical properties. Subsequently, a tungsten heavy alloy based on W-Ni-Co was consolidated using this powder through liquid phase sintering followed by heat treatment and swaging operations to realize long rods (~500 mm). This was followed by a detailed characterisation that included microstructure and mechanical property. The mechanical properties of these rods are promising, exhibiting a good balance of tensile and impact properties, which in turn underscores the potential of these recycled powders in the production of premium quality heavy alloy long rods for stringent applications such as kinetic energy penetrators.

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Section: Tensile and Impact Propertiesmentioning

confidence: 78%

Microstructure and Mechanical Properties of Tungsten Heavy Alloy Prepared Using Tungsten Metal Powder Produced from Heavy Alloy Scrap

Kiran,

Panchal,

Kamal

et al. 2023

Def. Sc. J.

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“…It is important to mention here that the work hardening rate and flow stress in higher strain regime (stage III) display a linear relationship. This has later been extended successfully to a two-phase material consisting of bcc and fcc phases [51].…”

Section: Discussionmentioning

confidence: 99%

Microstructure, Texture, Tensile Flow and Work Hardening Behavior of Tungsten Heavy Alloys in Swaged and Swaged + Aged Conditions

Panchal

Reddy

Azeem

et al. 2020

Metallogr. Microstruct. Anal.

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Present work describes the development of microstructure, texture, tensile flow and work hardening behavior of tungsten heavy alloys in swaged and swaged + aged conditions. The microstructural attributes of both the alloys such as the average W-grain size, shape, volume fractions of matrix phase and contiguity are nearly same in swaged and swaged + aged conditions. The textures of W-grains and matrix are different in swaged and swaged + aged alloys. The overall ODF intensities of W-grains and matrix phase are moderate and weak, respectively. Both the alloys show higher strength and slightly lower elongation after aging of the swaged samples. The aging has significantly reduced the impact toughness values of both the alloys in swaged condition. The true stress-true strain plots of both the alloys in swaged and swaged + aged conditions exhibit continuous increase in stress from σ YS to σ UTS (except yield point phenomenon in swaged + aged samples). Both the alloys in swaged + aged condition reveal the presence of yield point phenomenon. Bulk hardness values of both the alloys increase from swage to swaged + aged conditions. The true stress-true plastic strain curves on log-log scale of both the alloys in swaged and swaged + aged conditions display single slope only and follow Swift constitutive equation due to presence of pre-strain in the materials. The overall nature of the instantaneous curves is same in swaged and swaged + aged conditions. These curves exhibit three distinctive regimes of strain hardening that are stage I, stage II and stage III. The linear part of stage III has been explained using KME model in both alloys.

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“…The other reported values [12][13][14][15]20,21,29,30] of microstructural parameters such as relative density, W-W contiguity, mean W grain size, bending strength, and room temperature tensile properties of the WHAs (with the W content of 92-93%) prepared by different processing methods are summarized in Table 5 for comparison. The 93W-5.6Ni-1.4Fe alloys prepared in this study by SPS using the fine spherical W powders as raw materials showed almost the same microstructural characteristics and bending strength as those of ones fabricated by cyclic SPS and transient liquid-phase SPS reported in our previous article.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A Tungsten Heavy Alloy with Enhanced Performance Prepared by Spark Plasma Sintering from Fine Spherical Tungsten Powders

Han

Khanlari

et al. 2022

Adv Eng Mater

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Traditional tungsten heavy alloys (WHAs), with a coarse liquid‐phase sintered microstructure, have moderate strength and excellent ductility. Grain refinement is one of the effective methods to improve the strength of these WHAs. The routine spark plasma sintering (SPS) method can refine W grains; however, the obtained typical solid‐state sintered microstructure is detrimental to the performance. Adapted SPS methods such as cyclic SPS and transient liquid‐phase SPS, proposed in the previous study, are capable of modifying W grain morphology to further enhance the performance of parts. They are, however, complex processes, especially when it comes to mass production. In this research, 93W–5.6Ni–1.4Fe heavy alloys (93WHAs) with similar liquid‐phase sintered microstructure are prepared via SPS at solid‐state sintering temperature using fine spherical W powders as raw materials. The influences of the W powder shape and powder mixing condition on the microstructural and mechanical properties of the prepared 93WHAs are investigated. An improved microstructure is obtained in the 93WHA prepared using spherical W powders blended with nano Ni and Fe powders as raw materials, as compared to using the irregular W powders. The alloy thus shows elevated mechanical properties, due to the improved matrix phase distribution and the W grain morphology.

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On the flow and work hardening behavior of tungsten heavy alloy 92W-5.5Ni-2.5Fe

Cited by 11 publications

References 29 publications

Microstructure and Mechanical Properties of Tungsten Heavy Alloy Prepared Using Tungsten Metal Powder Produced from Heavy Alloy Scrap

Microstructure and Mechanical Properties of Tungsten Heavy Alloy Prepared Using Tungsten Metal Powder Produced from Heavy Alloy Scrap

Microstructure, Texture, Tensile Flow and Work Hardening Behavior of Tungsten Heavy Alloys in Swaged and Swaged + Aged Conditions

A Tungsten Heavy Alloy with Enhanced Performance Prepared by Spark Plasma Sintering from Fine Spherical Tungsten Powders

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