The role of microstructure on tensile plastic behavior of ductile iron GJS 400 produced through different cooling rates, Part I: Microstructure

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Abstract

A series of samples made of ductile iron GJS 400 was cast with different cooling rates, and their microstructural features were investigated. Quantitative metallography analyses compliant with ASTM E2567-16a and ASTM E112-13 standards were performed in order to describe graphite nodules and ferritic grains. The occurrence of pearlite was associated to segregations described through Energy Dispersive X-ray Spectroscopy (EDS) analyses. Results were related to cooling rates, which were simulated through MAGMASOFT software. This microstructural characterization, which provides the basis for the description and modeling of the tensile properties of GJS 400 alloy, subject of a second part of this investigation, highlights that higher cooling rates refines microstructural features, such as graphite nodule count and average ferritic grain size.

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Angella, G., Ripamonti, D., Górny, M., Masaggia, S., & Zanardi, F. (2019). The role of microstructure on tensile plastic behavior of ductile iron GJS 400 produced through different cooling rates, Part I: Microstructure. Metals, 9(12). https://doi.org/10.3390/met9121282

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