Zhang, F.; Zhao, Y.; Tan, Y.; Ji, X.; Xiang, S. Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals 2019, 9, 1133. https://doi.org/10.3390/met9111133

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Zhang F, Zhao Y, Tan Y, Ji X, Xiang S. Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals. 2019; 9(11):1133. https://doi.org/10.3390/met9111133

Zhang, Fei, Yonggang Zhao, Yuanbiao Tan, Xuanming Ji, and Song Xiang. 2019. "Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel" Metals 9, no. 11: 1133. https://doi.org/10.3390/met9111133

Zhang, F.; Zhao, Y.; Tan, Y.; Ji, X.; Xiang, S. Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals 2019, 9, 1133. https://doi.org/10.3390/met9111133

Zhang, F., Zhao, Y., Tan, Y., Ji, X., & Xiang, S. (2019). Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals, 9(11), 1133. https://doi.org/10.3390/met9111133

Zhang F, Zhao Y, Tan Y, Ji X, Xiang S. Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals. 2019; 9(11):1133. https://doi.org/10.3390/met9111133

Abstract: The relationship between microstructure parameters and mechanical properties was studied in this paper. The steel was heat-treated at different austenitizing temperatures to acquire varying microstructure. The results showed that austenite grain size increases with austenitizing temperature, while the pearlite colony size was relatively constant. The strength followed a Hall–Petch relationship with the austenite grain size, but the austenite grain size has nothing to do with the impact toughness. The control unit for determining the impact toughness of pearlitic steel is the pearlite colony size using a comparison method. Further studies have found that, in the hypoeutectoid steel and hypereutectoid steel, the pearlite colony size changes with the austenitizing temperature. However, when the eutectoid steel with a carbon content of 0.81% undergoes the isothermal transformation, the number of grain boundary precipitates is very few. There are many nucleation sites at the grain boundary. The pearlite colonies randomly nucleate at the grain boundaries and grow into the interior of the grains. Simultaneously, new pearlite colonies nucleate by the side of the existing pearlite colony. The intragranular pearlite colonies are also randomly nucleated. These nucleation sites increase the chance of the growing pearlite colonies colliding with each other, eventually resulting in a constant pearlite colony size. Keywords: pearlitic steel; prior austenite grain; pearlite colony; impact toughness; nucleation

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Feature papers are submitted upon individual invitation or recommendation by the scientific editors and must receive positive feedback from the reviewers.

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Zhang, Fei, Yonggang Zhao, Yuanbiao Tan, Xuanming Ji, and Song Xiang. 2019. "Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel" Metals 9, no. 11: 1133. https://doi.org/10.3390/met9111133

Zhang, F., Zhao, Y., Tan, Y., Ji, X., & Xiang, S. (2019). Study on the Nucleation and Growth of Pearlite Colony and Impact Toughness of Eutectoid Steel. Metals, 9(11), 1133. https://doi.org/10.3390/met9111133

Feature papers represent the most advanced research with significant potential for high impact in the field. A Feature Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for future research directions and describes possible research applications.