کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1677605 | 1518346 | 2013 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Combined nano-SIMS/AFM/EBSD analysis and atom probe tomography, of carbon distribution in austenite/ε-martensite high-Mn steels Combined nano-SIMS/AFM/EBSD analysis and atom probe tomography, of carbon distribution in austenite/ε-martensite high-Mn steels](/preview/png/1677605.png)
We introduce a new experimental approach for the identification of the atomistic position of interstitial carbon in a high-Mn binary alloy consisting of austenite and ε-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 ε-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.
► We introduce a new experimental approach for the detection of carbon atoms in the high-Mn steels.
► The carbon atoms are partitioned to γ phase than to ε-martensite.
► The carbon is also trapped at phase boundaries, stacking faults, and austenite grain boundaries.
► Segregation and/or partitioning of carbon contribute to the phase transformation of the alloy.
Journal: Ultramicroscopy - Volume 132, September 2013, Pages 248–257