Microstructure, tensile and toughness properties after quenching and partitioning treatments of a medium-carbon steel

The effect of different microstructures on the tensile and toughness properties of a low alloy medium carbon steel (0.28C–1.4Si–0.67Mn–1.49Cr–0.56Mowt%) was investigated, comparing the properties obtained after the application of selected quenching and partitioning (Q&P) and quenching and temper...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2013-01, Vol.559, p.486-495
Main Authors: Paravicini Bagliani, E., Santofimia, M.J., Zhao, L., Sietsma, J., Anelli, E.
Format: Article
Language:English
Subjects:
Applied sciences
Bainite
Elasticity. Plasticity
Exact sciences and technology
Heat treatment
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Partitioning
Production techniques
Quenching
Retained austenite
Tempering
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Summary:The effect of different microstructures on the tensile and toughness properties of a low alloy medium carbon steel (0.28C–1.4Si–0.67Mn–1.49Cr–0.56Mowt%) was investigated, comparing the properties obtained after the application of selected quenching and partitioning (Q&P) and quenching and tempering (Q&T) treatments. After Q&T the strength–toughness combination was the lowest, whereas the best combination was achieved by Q&P, as a result of the carbon depletion of the martensite and the high stabilization of the austenite. Nonetheless, the presence of islands of martensite/austenite (MA) constituents after Q&P treatments prevented the achievement of toughness levels comparable to the ones currently obtainable with other steels and heat treatments.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2012.08.130