Nanoscale Solute Partitioning and Carbide Precipitation in a Multiphase TRIP Steel Analyzed by Atom Probe Tomography
Abstract
Nanoscale solute partitioning across multiple constituent phases in a 980 grade quenched and partitioned (Q&P) steel was analyzed using atom probe tomography (APT). The Q&P process was used to increase the C content in the retained austenite phase thereby improve its stability under plastic straining. Significant carbon enrichment of austenite was measured with decreased levels of C in martensite, and almost depleted C content in ferrite, supporting the C partitioning mechanism proposed in the literature. The APT analysis of retained austenite surrounded by martensite demonstrated a higher amount of C content in comparison to retained austenite surrounded by the ferrite phase. Lath and discrete carbide particle precipitation was also observed inside martensite colonies, tying up C and reducing the total amount of C available for austenite stabilization. In addition, the partitioning of Mn and other minor elements was quantitatively investigated by correlating APT and SEM-EBSD. These techniques provide a robust methodology for analyzing nanoscale compositional partitioning in multiphase steels, TRIP steels in particular, which can be used to better explain their microstructure-mechanical property relationships.
- Authors:
-
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Clemson Univ., Greenville, SC (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- General Motors Global Technical Center, Warren, MI (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1461048
- Alternate Identifier(s):
- OSTI ID: 1560642
- Report Number(s):
- PNNL-SA-132326
Journal ID: ISSN 1047-4838
- Grant/Contract Number:
- AC05-00OR22725; AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- JOM. Journal of the Minerals, Metals & Materials Society
- Additional Journal Information:
- Journal Volume: 70; Journal Issue: 829; Journal ID: ISSN 1047-4838
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Carbon partitioning, quenching and partitioning
Citation Formats
Devaraj, Arun, Xu, Zeren, Abu-Farha, Fadi, Sun, Xin, and Hector, Jr., Louis G. Nanoscale Solute Partitioning and Carbide Precipitation in a Multiphase TRIP Steel Analyzed by Atom Probe Tomography. United States: N. p., 2018.
Web. doi:10.1007/s11837-018-2974-1.
Devaraj, Arun, Xu, Zeren, Abu-Farha, Fadi, Sun, Xin, & Hector, Jr., Louis G. Nanoscale Solute Partitioning and Carbide Precipitation in a Multiphase TRIP Steel Analyzed by Atom Probe Tomography. United States. https://doi.org/10.1007/s11837-018-2974-1
Devaraj, Arun, Xu, Zeren, Abu-Farha, Fadi, Sun, Xin, and Hector, Jr., Louis G. Tue .
"Nanoscale Solute Partitioning and Carbide Precipitation in a Multiphase TRIP Steel Analyzed by Atom Probe Tomography". United States. https://doi.org/10.1007/s11837-018-2974-1. https://www.osti.gov/servlets/purl/1461048.
@article{osti_1461048,
title = {Nanoscale Solute Partitioning and Carbide Precipitation in a Multiphase TRIP Steel Analyzed by Atom Probe Tomography},
author = {Devaraj, Arun and Xu, Zeren and Abu-Farha, Fadi and Sun, Xin and Hector, Jr., Louis G.},
abstractNote = {Nanoscale solute partitioning across multiple constituent phases in a 980 grade quenched and partitioned (Q&P) steel was analyzed using atom probe tomography (APT). The Q&P process was used to increase the C content in the retained austenite phase thereby improve its stability under plastic straining. Significant carbon enrichment of austenite was measured with decreased levels of C in martensite, and almost depleted C content in ferrite, supporting the C partitioning mechanism proposed in the literature. The APT analysis of retained austenite surrounded by martensite demonstrated a higher amount of C content in comparison to retained austenite surrounded by the ferrite phase. Lath and discrete carbide particle precipitation was also observed inside martensite colonies, tying up C and reducing the total amount of C available for austenite stabilization. In addition, the partitioning of Mn and other minor elements was quantitatively investigated by correlating APT and SEM-EBSD. These techniques provide a robust methodology for analyzing nanoscale compositional partitioning in multiphase steels, TRIP steels in particular, which can be used to better explain their microstructure-mechanical property relationships.},
doi = {10.1007/s11837-018-2974-1},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 829,
volume = 70,
place = {United States},
year = {Tue Jun 26 00:00:00 EDT 2018},
month = {Tue Jun 26 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: