Quantitative investigation into the influence of temperature on carbide and austenite evolution during partitioning of a quenched and partitioned steel

The influence of partitioning temperature on microstructural evolution during quenching and partitioning was investigated in a 0.38C1.54Mn1.48Si wt.% steel using Mössbauer spectroscopy and transmission electron microscopy. η-carbide formation occurs in the martensite during the quenching, holding, a...

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Bibliographic Details
Published in:Scripta materialia 2016-08, Vol.121 (C), p.5-9
Main Authors: Pierce, D.T., Coughlin, D.R., Williamson, D.L., Kähkönen, J., Clarke, A.J., Clarke, K.D., Speer, J.G., De Moor, E.
Format: Article
Language:English
Subjects:
Austenite
Carbides
Cementite
Evolution
Formations
M ssbauer spectroscopy
Martensite
MATERIALS SCIENCE
Mössbauer spectroscopy
Partitioning
Quenching
Quenching and partitioning
Retained austenite
Steels
Transition carbides
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Summary:The influence of partitioning temperature on microstructural evolution during quenching and partitioning was investigated in a 0.38C1.54Mn1.48Si wt.% steel using Mössbauer spectroscopy and transmission electron microscopy. η-carbide formation occurs in the martensite during the quenching, holding, and partitioning steps. More effective carbon partitioning from martensite to austenite was observed at 450 than 400°C, resulting in lower martensite carbon contents, less carbide formation, and greater retained austenite amounts for short partitioning times. Conversely, greater austenite decomposition occurs at 450°C for longer partitioning times. Cementite forms during austenite decomposition and in the martensite for longer partitioning times at 450°C. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2016.04.027