Combined nano-SIMS/AFM/EBSD analysis and atom probe tomography, of carbon distribution in austenite/ε-martensite high-Mn steels
SCIE
SCOPUS
- Title
- Combined nano-SIMS/AFM/EBSD analysis and atom probe tomography, of carbon distribution in austenite/ε-martensite high-Mn steels
- Authors
- Jae Bok Seol; Lee, BH; Choi, P; Lee, SG; Park, CG
- Date Issued
- 2013-09
- Publisher
- Ultramicroscopy
- Abstract
- We introduce a new experimental approach for the identification of the atomistic position of interstitial carbon in a high-Mu binary alloy consisting of austenite and epsilon-martensite. Using combined nano-beam secondary ion mass spectroscopy, atomic force microscopy and electron backscatter diffraction analyses, we clearly observe carbon partitioning to austenite. Nano-beam secondary ion mass spectroscopy and atom probe tomography studies also reveal carbon trapping at crystal imperfections as identified by transmission electron microscopy. Three main trapping sites can be distinguished: phase boundaries between austenite and epsilon-martensite, stacking faults in austenite, and prior austenite grain boundaries. Our findings suggest that segregation and/or partitioning of carbon can contribute to the austenite-to-martensite transformation of the investigated alloy. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
- Keywords
- Carbon in high-Mn steel; epsilon-martensite; Electron back scattered diffraction; Nano-beam secondary ion mass spectroscopy; Transmission electron microscopy; Atom probe tomography; STACKING-FAULT ENERGY; FCC->HCP TRANSFORMATION; MECHANICAL-PROPERTIES; ELECTRON-MICROSCOPY; EPSILON-MARTENSITE; ALLOYING ELEMENTS; DAMPING CAPACITY; GRAIN-BOUNDARY; SEGREGATION; BORON
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14984
- DOI
- 10.1016/J.ULTRAMIC.2013.01.009
- ISSN
- 0304-3991
- Article Type
- Article
- Citation
- Ultramicroscopy, vol. 132, page. 248 - 257, 2013-09
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