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

Here, the influence of partitioning temperature on microstructural evolution during quenching and partitioning was investigated in a 0.38C-1.54Mn-1.48Si 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. Lastly, cementite forms during austenite decomposition and in the martensite for longer partitioning times at 450°C.
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [2] ;  [4] ;  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Colorado School of Mines, Golden, CO (United States). Department of Physics
  4. Colorado School of Mines, Golden, CO (United States). Advanced Steel Processing and Products Research Center
Publication Date:
Grant/Contract Number:
AC05-00OR22725; EE0005765; AC52-06NA25396
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 121; Journal Issue: C; Journal ID: ISSN 1359-6462
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
Country of Publication:
United States
36 MATERIALS SCIENCE; Quenching and partitioning; Transition carbides; M ssbauer spectroscopy; Retained austenite; Cementite
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1337415