A model for the effect of microstructure on the ultimate tensile strength of cast irons

The aim of the present study is to elucidate the influence of individual microstructural parameters, such as pearlite fraction, nodularity, and eutectic cell size, on the tensile strength (UTS) of cast irons. The UTS model was built by integrating the rule of mixtures for each microstructural compon...

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Bibliographic Details
Published in:International journal of metalcasting 2024-06
Main Authors: Matsushita, Taishi, Domeij, Björn, Fourlakidis, Vasilios, Belov, Ilja, Diószegi, Attila
Format: Article
Language:English
Subjects:
cast iron
component casting
microstructure
ultimate tensile strength
UTS
Online Access:Get full text
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Summary:The aim of the present study is to elucidate the influence of individual microstructural parameters, such as pearlite fraction, nodularity, and eutectic cell size, on the tensile strength (UTS) of cast irons. The UTS model was built by integrating the rule of mixtures for each microstructural component, and the UTS was described as a function of the aforementioned factors. The UTS and the required microstructure parameters for the model calculation were obtained experimentally. In the model, two coefficients were introduced to quantify the influence of the eutectic cell size and the interaction terms for the mixed two components. These coefficients were determined through fitting the experimental data, and the model's accuracy was validated using data not included in the fitting process. The results exhibited reasonable agreement, confirming the model's reliability. The model, thus, offers insights into the influence of each microstructural factor on UTS and serves as a guide for designing alloys to achieve the desired UTS through microstructure modifications.
ISSN:2163-3193
1939-5981
DOI:10.1007/s40962-024-01382-w