Determination of Johnson Cook Material Model Constants and Their Influence on Machining Simulations of Tungsten Heavy Alloy

Sagar, Chithajalu Kiran; Priyadarshini, Amrita; Gupta, Amit Kumar; Shukla, Sidharth Kumar

doi:10.1115/imece2018-88270

Cited by 4 publications

(1 citation statement)

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“…Sagar, et al [5][6][7] used uncoated cemented carbide inserts to investigate the tool wear rate and the effect of tungsten content on various machining outputs while turning WHAs. Nandam et al 8 used carbide tooling under cryogenic conditions.…”

Section: Introductionmentioning

confidence: 99%

Machining and Tribological Characterisation of Uncoated and Coated Carbide Inserts while Turning Tungsten Heavy Alloy

et al. 2023

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Tungsten heavy alloys are high density alloys containing 80 to 98 wt.% tungsten and the balance is a matrix made of relatively low melting elements such as copper, nickel and iron. These alloys are used as radiation shields, CG adjusters and also in armour piercing ammunition. Machining these alloys to close tolerances and finish leads to excessive tool wear, surface damage and hence proves to be a challenging task. This study focuses on turning operation carried out under dry and wet cutting conditions using three different commercially available cemented carbide inserts. Three different feed rates have been used at a constant depth of cut and cutting speed. The best possible cemented carbide tooling solution for machining tungsten heavy alloys has been determined based on the surface finish obtained, chip geometry, cutting forces, and machining temperature. The observations made during machining are correlated to the tribological behavior of the inserts and the alloy with the help of pin-on disc tests. Coated cemented carbide inserts provide surface roughness values lower than 1 µm under finish turning conditions. On the other hand, PVD coated inserts give consistently better results over different feed rates and are found to experience lower tool wear for the specific cutting conditions. Analytical tool wear model suggests better tool life for the PVD coated insert.

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Section: Introductionmentioning

confidence: 99%

Machining and Tribological Characterisation of Uncoated and Coated Carbide Inserts while Turning Tungsten Heavy Alloy

et al. 2023

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A Review of the Constitutive Modelling of Metals and Alloys in Machining Process

Bakhshan,

Oñate,

Carbonell i Puigbó

2023

Arch Computat Methods Eng

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Conventional machining still represents a predominant manufacturing process for the production of metal parts. During the last few decades, extensive research has been conducted to develop predictive models to capture complex material response during the machining process. Understanding the plastic behavior of the metals and alloys during machining operations has a great significance for researchers and engineers in both academia and industry. This paper thoroughly reviews the constitutive material models that have been employed thus far in the conventional machining studies. The aim of the paper is to present all significant constitutive models focusing the discussion on the most frequently used. First, we introduce the phenomenological models that depend on the deformation variables including strain, strain rate and temperature. Several extended versions proposed in the literature of these types of models will be reviewed. The techniques to identify the material constant parameters will also be discussed. Second, the proposed physical-based models, a kind of model that relies on the evolution of internal state variables, including dislocation density and grain size, will be addressed. Following that, novel data-driven based constitutive models are briefly debated to highlight their capabilities in order to be exploited in machining analysis. Finally, a concise overview and perspectives for future research efforts are outlined.

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Effect of machining operations on mechanical properties, surface integrity and corrosion resistance of tungsten heavy alloy

S.,

Priyadarshini,

Chaganti

et al. 2023

Materials Today Communications

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Determination of Johnson Cook Material Model Constants and Their Influence on Machining Simulations of Tungsten Heavy Alloy

Cited by 4 publications

References 0 publications

Machining and Tribological Characterisation of Uncoated and Coated Carbide Inserts while Turning Tungsten Heavy Alloy

Machining and Tribological Characterisation of Uncoated and Coated Carbide Inserts while Turning Tungsten Heavy Alloy

A Review of the Constitutive Modelling of Metals and Alloys in Machining Process

Effect of machining operations on mechanical properties, surface integrity and corrosion resistance of tungsten heavy alloy

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