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Open AccessFeature PaperArticle

Austenite Reverse Transformation in a Q&P Route of Mn and Ni Added Steels

1
Tecnalia, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Bizkaia, Astondo Bidea, 700, E-48160 Derio, Spain
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Department Mining, Metallurgical and Materials Science, UPV/EHU, Plaza Torres Quevedo 1, 48013 Bilbao, Spain
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ArcelorMittal Maizieres Research SA, Voie Romaine-BP30320, 57283 Maizières-lès-Metz, France
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Swerim AB, Box 7047 SE-164 07 Kista, Sweden
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Centro Ricerche Fiat, Corso Settembrini 40, Porta 8, Corpo 1, 10135 Torino, Italy
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Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Metals 2020, 10(7), 862; https://doi.org/10.3390/met10070862
Received: 29 May 2020 / Revised: 15 June 2020 / Accepted: 22 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue Advanced High Strength Steels by Quenching and Partitioning)
In this work, four low carbon steels with different contents of Mn and Ni were heat treated by quenching and partitioning (Q&P) cycles where high partitioning temperatures, in the range of 550 °C–650 °C, were applied. In order to elucidate the effect of applying these high partitioning temperatures with respect to more common Q&P cycles, the materials were also heat treated considering a partitioning temperature of 400 °C. The microstructure evolution during the Q&P cycles was studied by means of dilatometry tests. The microstructural characterization of the treated materials revealed that austenite retention strongly depended on the alloy content and partitioning conditions. It was shown that the occurrence of austenite reverse transformation (ART) in the partitioning stage in some of the alloys and conditions was a very effective mechanism to increase the austenite content in the final microstructure. However, the enhancement of tensile properties achieved by the application of high partitioning temperature cycles was not significant. View Full-Text
Keywords: quenching and partitioning; austenite reverse transformation; Mn and Ni influence; austenite stabilization quenching and partitioning; austenite reverse transformation; Mn and Ni influence; austenite stabilization
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MDPI and ACS Style

Arribas, M.; Gutiérrez, T.; Del Molino, E.; Arlazarov, A.; De Diego-Calderón, I.; Martin, D.; De Caro, D.; Ayenampudi, S.; Santofimia, M.J. Austenite Reverse Transformation in a Q&P Route of Mn and Ni Added Steels. Metals 2020, 10, 862.

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