Quantitative investigation into the influence of temperature on carbide and austenite evolution during partitioning of a quenched and partitioned steel. (August 2016)

• Record Type: Journal Article
• Authors: Pierce, D.T.; Coughlin, D.R.; Williamson, D.L.; Kähkönen, J.; Clarke, A.J.; Clarke, K.D.; Speer, J.G.; De Moor, E.
• Is Part Of: Scripta materialia. Volume 121(2016)
• Page Start: 5
• Page End: 9
• Publication Date: 2016-08
• Subjects: Quenching and partitioning -- Transition carbides -- Mössbauer spectroscopy -- Retained austenite -- Cementite; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.04.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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. Graphical abstract: