Computational estimation of elastic properties of spark plasma sintered TaC by meshfree and finite element methods

Bakshi, Srinivasa Rao; Bhargava, Akanksha; Mohammadizadeh, S.; Agarwal, Arvind; Tsukanov, Igor

doi:10.1016/j.commatsci.2011.04.003

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…The microstructure of the composites, their grain size distribution, and dispersion of WS 2 reinforcements was investigated by optical microscopy, scanning electron microscopy, image analysis, and the Delaunay triangulation method. [ 27 ] The representative microstructures, presented in Figure a–d, show that all the specimens exhibit a large distribution of grain sizes. This distribution, measured by the linear intercept method according to ASTM E112, [ 30 ] is shown in Figure 1e.…”

Section: Resultsmentioning

confidence: 99%

“…The elastic modulus and Poisson's ratio of porosity are 10 −8 and 0.48, respectively. [ 27 ] A representative output of the computation workflow, using a micrograph of the Al 6061 –WS 2 U45 composite at 500×, is presented in Figure . In order to achieve an optimum balance between high‐resolution calculations and the speed of computations, the mesh is constructed with quadrilateral elements (Figure 6).…”

Section: Resultsmentioning

confidence: 99%

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Role of Ultrasonic Treatment on Microstructure, Multiscale Mechanical, and Tribological Behavior of 2D Tungsten Disulfide Reinforced Aluminum Composites

et al. 2022

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This article is the first report on the role of ultrasonic treatment (UST) on microstructural evolution, multiscale mechanical behavior, and tribological response in 2D tungsten disulfide (WS2) reinforced aluminum (Al6061) matrix composites. Delaunay triangulation calculations show that UST for 45 s enables a fourfold enhancement in the dispersion parameter of WS2 reinforcements in the Al6061 matrix from 0.08 to 0.32. Improved WS2 dispersion contributes to higher nucleation density with 52.7% grain refinement efficiency, achieving a fine‐grained Al6061–WS2 composite. The role of UST‐induced 2D reinforcement dispersion on the elastic deformation is established at progressively increasing length scales from individual grains to the bulk composite. It is accomplished by integrating the nanodynamic modulus mapping technique with a finite element modeling framework built on experimentally acquired microstructures and localized elastic moduli. It delineates a directly proportional relationship between UST‐induced dispersion and elastic modulus enhancement at all length scales from 10 to 700 μm. Excellent dispersion of the 2D layered WS2 homogenizes the tribological response of the composite material with a tenfold reduction in the volume of material lost during wear.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Role of Ultrasonic Treatment on Microstructure, Multiscale Mechanical, and Tribological Behavior of 2D Tungsten Disulfide Reinforced Aluminum Composites

et al. 2022

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“…The notable improvement in young's modulus (25-32%) was attributed to the high elastic modulus possessed by CNTs ($ 1 TPa). 24 The lower value in Young's modulus of Blend #1 than that of Blend #2 may come from the relative low elastic modulus of TaC ($ 283 GPa), 25 as well as the less densified structure of Blend #1 with porosity. As can be observed from the hardness curve, the average hardness for sintered pure SiC was 28.1 GPa.…”

Section: Resultsmentioning

confidence: 99%

Spark plasma sintering of TaC and/or CNTs reinforced SiC CMCs

Xie

Wosu

2015

Journal of Composite Materials

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This study focuses on a two-stage spark plasma sintering of TaC and/or carbon nanotubes (CNTs) reinforced SiC ceramic composites. The influence of reinforcements of TaC and CNTs, as well as sintering parameters, such as pressure, heating rate, and temperature, is investigated on the densification behavior and mechanical properties of the TaC–CNTs–SiC system. The results showed that the addition of CNTs increased the densification of SiC from 86% to 99.5% while still maintaining submicron grain size under the sintering parameters of 133℃/min, 1800℃, and 90 MPa pressure. TaC additives did not favor the densification of CNT–SiC ceramics but increased the nano hardness of the composites.

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“…This analysis technique has been employed to numerically simulate mechanical and thermo-physical properties of coatings and composite materials in recent years [2]. OOF can be used to determine various properties of a structure, and it is important to know what it is that is desired [3]. The starting material was commercially pure copper space holder mixed with copper powder SM400105R with 99.7 % purity and 40 lm size supplied by Art Molds.…”

Section: Introductionmentioning

confidence: 99%

Porosity comparative analysis of porous copper and OOF modelling

2015

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An understanding of the overall porous copper behavior is developed through the combination of real data from microstructures and the fundamental material characteristics of the constitutive phases. Captured morphological images, using the Nano-CT are utilized to generate the geometric information. Object-oriented finite element (OOF) analysis is quite a novel numerical approach to incorporate morphological images, acquired from scanning electron microscopy into 2-D finite element modeling. This paper seeks to investigate the porosities using two methods (Archimedes principle and Nano-CT) and then to introduce an image-based extended OOF modeling technique based on mapping the real microstructures of porous copper and gage its ability to predict the elastic moduli and evaluate the deformation mechanism resulting from the porous copper. Dissolution sintering technique was used by mixing Cu powders with NaCl in the volume ratio of 1:1 and 1:3 adding polyvinyl alcohol solution as a binder with NaCl as the space holder. The green form was pressed at 375 MPa using a four-column hydraulic lab press. The NaCl was leached out in hot water at 70°C and then sintered to a temperature of 850°C. Porosity values were determined from density measurements to give the porosity values of 42.2 and 45.71 % for volume ratio of 1:1 and 1:3, respectively. The material properties were obtained from the tests and compared to previous literature. Very good agreement has been shown, establishing the viability of this kind of morphology-based numerical approach.

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Computational estimation of elastic properties of spark plasma sintered TaC by meshfree and finite element methods

Cited by 12 publications

References 21 publications

Role of Ultrasonic Treatment on Microstructure, Multiscale Mechanical, and Tribological Behavior of 2D Tungsten Disulfide Reinforced Aluminum Composites

Role of Ultrasonic Treatment on Microstructure, Multiscale Mechanical, and Tribological Behavior of 2D Tungsten Disulfide Reinforced Aluminum Composites

Spark plasma sintering of TaC and/or CNTs reinforced SiC CMCs

Porosity comparative analysis of porous copper and OOF modelling

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