Influence of distribution and size of graphite particle on the machinability of nodular cast iron

Yang, H.W.; Wang, X.M.; Liu, W.; Huang, W.; Wu, M.; Xue, M.L.; Li, L.

doi:10.1016/j.engfracmech.2024.109882

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…Eiken [27] used a volumetric multiphase-field approach to explore the dynamic chemical gradients and their potential impact on carbon diffusion in cast-iron cells. The influence of the distribution and size of the graphite particle on the machinability of nodular cast iron was experimentally examined and quantitatively analysed by Yang et al [28]. Their findings revealed that the sizes and character of distribution of graphite particles affected the stress and strain fields in the cutting region of the materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure-Based CZE Model for Crack Initiation and Growth in CGI: Effects of Graphite-Particle Morphology and Spacing

Luo,

Baxevanakis,

Silberschmidt

2024

Solids

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Compacted graphite iron (CGI) is an engineering material with the potential to fill the application gap between flake- and spheroidal-graphite irons thanks to its unique microstructure and competitive price. Despite its wide use and considerable past research, its complex microstructure often leads researchers to focus on models based on representative volume elements with multiple particles, frequently overlooking the impact of individual particle shapes and interactions between the neighbouring particles on crack initiation and propagation. This study focuses on the effects of graphite morphology and spacing between inclusions on the mechanical and fracture behaviours of CGI at the microscale. In this work, 2D cohesive-zone-element-based models with different graphite morphologies and spacings were developed to investigate the mechanical behaviour as well as crack initiation and propagation. ImageJ and scanning electron microscopy were used to characterise and analyse the microstructure of CGI. In simulations, both graphite particles and metallic matrix were assumed isotropic and ductile. Cohesive zone elements (CZEs) were employed in the whole domain studied. It was found that graphite morphology had a negligible effect on interface debonding but nodular inclusions can notably enhance the stiffness of the material and effectively impede the propagation of cracks within the matrix. Besides, a small distance between graphite particles accelerates the crack growth. These results can be used to design and manufacture better metal-matrix composites.

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Section: Introductionmentioning

confidence: 99%

Microstructure-Based CZE Model for Crack Initiation and Growth in CGI: Effects of Graphite-Particle Morphology and Spacing

Luo,

Baxevanakis,

Silberschmidt

2024

Solids

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Foreign object damage characteristics of a thin nickel-based superalloy plate at room and high temperatures

Yang,

Liu

et al. 2024

Thin-Walled Structures

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Effect of Electroplastic-Assisted Grinding on Surface Quality of Ductile Iron

Feng,

Jia,

Zhang

et al. 2024

Lubricants

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Ductile iron is a heterogeneous material. The presence of spherical graphite and a hard and brittle structure makes the surface of the workpiece easily form pits and crack defects under harsh grinding conditions, which seriously affects the service life and service performance of the workpiece. The new assisted grinding process based on the electroplastic effect is expected to avoid the surface defects of ductile iron. By comparing the surface roughness and microstructure of conventional grinding and electroplastic-assisted grinding, the superiority of electroplastic-assisted grinding surface quality is confirmed. Further discussion is presented on the impact of grinding parameters on the workpiece’s surface quality under the same electrical parameters. The results show that the sensitivity of surface roughness to grinding parameters from strong to weak is grinding wheel speed, feed speed and grinding depth. The optimal combination of grinding parameters is determined as a grinding wheel speed of 30 m/s, a feed speed of 0.5 m/min and a grinding depth of 10 μm.

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Influence of distribution and size of graphite particle on the machinability of nodular cast iron

Cited by 4 publications

References 36 publications

Microstructure-Based CZE Model for Crack Initiation and Growth in CGI: Effects of Graphite-Particle Morphology and Spacing

Microstructure-Based CZE Model for Crack Initiation and Growth in CGI: Effects of Graphite-Particle Morphology and Spacing

Foreign object damage characteristics of a thin nickel-based superalloy plate at room and high temperatures

Effect of Electroplastic-Assisted Grinding on Surface Quality of Ductile Iron

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