Quantitative models for microstructure and thermal conductivity of vermicular graphite cast iron cylinder block based on cooling rate

Liu, Qingyi; Zhang, Xiaofu; Sun, Yucheng; An-li, Jiang; Li, Jichao; Tian, Xuelei

doi:10.1007/s41230-021-0005-2

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…The calculation results are shown in the Table 3 , and the error is about 2%. Metallographic images in Figure 7 and experimental values of thermal conductivity in Table 3 are derived from previous work [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

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A New Theoretical Method for Studying Effects of Microstructure on Effective Thermal Conductivity of Vermicular Graphite Cast Iron

et al. 2023

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To provide the basis for thermal conductivity regulation of vermicular graphite cast iron (VGI), a new theoretical method consisting of shape interpolation, unit cell model and numerical calculation was proposed. Considering the influence of the graphite anisotropy and interfacial contact thermal conductivity (ICTC), the effective thermal conductivity of a series of unit cell models was calculated by numerical calculation based on finite difference. The effects of microstructure on effective thermal conductivity of VGI were studied by shape interpolation. The experimental results were in good agreement with the calculated ones. The effective thermal conductivity of VGI increases in power function with the decrease in graphite shape parameter, and increases linearly with the increase in graphite volume fraction and thermal conductivity of matrix. When the graphite volume fraction increases by 1%, the thermal conductivity of nodular cast iron increases by about 0.18 W/(m·K), while that of gray cast iron increases by about 3 W/(m·K). The thermal conductivity of cast iron has the same sensitivity to the thermal conductivity of matrix regardless of the graphite shape parameter. The thermal conductivity of matrix increased by 15 W/(m·K) and the thermal conductivity of cast iron increased by about 12 W/(m·K). Moreover, the more the graphite shape deviates from the sphere, the greater the enhancement effect of graphite anisotropy on thermal conductivity than the hindrance effect of interface between graphite and matrix. This work can provide guidance for the development of high thermal conductivity VGI and the study of thermal conductivity of composites containing anisotropic dispersed phase particles with complex shapes.

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Section: Resultsmentioning

confidence: 99%

“… Two-dimensional morphology of graphite in ( a ) specimen 1, ( b ) specimen 2 and ( c ) specimen 3 [ 43 ]. …”

Section: Figurementioning

confidence: 99%

A New Theoretical Method for Studying Effects of Microstructure on Effective Thermal Conductivity of Vermicular Graphite Cast Iron

et al. 2023

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“…It is well known that the microstructure plays a vital role in the mechanical properties of alloys [11,12] , and alloying is an effective method to improve the microstructure [13,14] . Some carbide forming enhancing elements, such as Ti combined with W or Cr, or W together with C, were used to improve the hardness and tensile strength of gray cast iron [15,16] .…”

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confidence: 99%

Effect of V and Sn on microstructure and mechanical properties of gray cast iron

Chen

Wang

et al. 2022

China Foundry

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The performance of an engine is significantly impacted by the quality of the cylinder liner, one of its key components. Gray cast iron has low cost (20%-40% cheaper than steel) and many desirable properties such as good castability, machining property, and wear resistance [1][2][3][4][5][6] . Due to the special graphite morphology, gray cast iron has a perfect combination of good mechanical properties and thermal conductivity, therefore, is widely used in engine cylinder liners [7,8] . With the rapid development of the industry, cylinder liners are required to work at higher and higher temperature and pressure, which will easily lead to the failure of cylinder liners [9] . Strict service environment puts forward high requirements for cast iron materials, such as high strength and hardness, high thermal fatigue

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Influence of V Content on Microstructure and Mechanical Properties of Gray Cast Iron for Super-Large Cylinder Liner

Wang

Chen

et al. 2022

Inter Metalcast

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Quantitative models for microstructure and thermal conductivity of vermicular graphite cast iron cylinder block based on cooling rate

Cited by 5 publications

References 17 publications

A New Theoretical Method for Studying Effects of Microstructure on Effective Thermal Conductivity of Vermicular Graphite Cast Iron

A New Theoretical Method for Studying Effects of Microstructure on Effective Thermal Conductivity of Vermicular Graphite Cast Iron

Effect of V and Sn on microstructure and mechanical properties of gray cast iron

Influence of V Content on Microstructure and Mechanical Properties of Gray Cast Iron for Super-Large Cylinder Liner

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