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Open AccessArticle

Microstructural and Mechanical Characterization of a Nanostructured Bainitic Cast Steel

1
Gipimme, Department of Materials Engineering, Engineering Faculty, Universidad de Antioquia, Calle 67 #53-108, Bloque 18, Oficina 240, Medellín 050010, Colombia
2
Department of Physical Metallurgy, National Center for Metallurgical Research (CENIM-CSIC), Avenida Gregorio del Amo, 8, 28040 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Metals 2020, 10(5), 612; https://doi.org/10.3390/met10050612
Received: 15 April 2020 / Revised: 4 May 2020 / Accepted: 6 May 2020 / Published: 8 May 2020
(This article belongs to the Special Issue Advanced Multiphase Steels)
Nanoscale bainite is a remarkable microstructure that exhibits a very promising combination of high strength with good ductility and toughness. The development of these types of microstructures has been focused on wrought materials, and very little information is available for steel castings. In this work, a specially designed cast steel with 0.76 wt % C was fabricated, and the heat treatment cycles to develop bainitic nanostructures were determined by studying the kinetics of the bainitic transformation using high-resolution dilatometry. The effects of isothermal holding temperature and time on the final microstructure and mechanical properties were thoroughly characterized in order to evaluate a future industrial implementation of the process in an effort to contribute to enhance and widen the potential applications for cast steels. View Full-Text
Keywords: nanobainite; cast steels; austenite stability; bainitic transformation nanobainite; cast steels; austenite stability; bainitic transformation
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MDPI and ACS Style

Santacruz-Londoño, A.F.; Rios-Diez, O.; Jiménez, J.A.; Garcia-Mateo, C.; Aristizábal-Sierra, R. Microstructural and Mechanical Characterization of a Nanostructured Bainitic Cast Steel. Metals 2020, 10, 612.

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