Journal
SCRIPTA MATERIALIA
Volume 213, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.114642
Keywords
Chemical short-range order (CSRO); Austenitic steels; Transmission electron microscopy (TEM); Electron diffraction
Categories
Funding
- Ministry of Edu-cation
- National Research Foundation of Korea [2021EG046010105]
- National Research Foundation of Korea grant funded (NRF) by the Korean gov-ernment (MSIT) [NRF-2020R1C1C1006214]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1A2C4002622]
- National Research Foundation of Korea [2021R1A2C4002622] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, the existence of chemical short-range order (CSRO) in high-Mn austenitic steel is demonstrated using electron diffraction measurements and dark field imaging via transmission electron microscopy. The CSRO induces additional diffuse scattering and lattice distortions in the steel samples.
In this study, we demonstrate the existence of chemical short-range order (CSRO) in high-Mn (25Mn-0.6C-Fe in wt%) austenitic steel. A definitive proof of CSRO was obtained by electron diffraction measurements and dark field imaging via transmission electron microscopy. CSRO in the steel sample generated additional diffuse scattering in selected area electron diffraction patterns along high-index zone axes, namely, [1 1 1](gamma), [1 1 2](gamma), and [1 3 0](gamma), which was absent along low-index zone axes, namely, [1 1 0](gamma) and [0 0 1](gamma). We found that CSRO induced lattice distortions, and the corresponding interplanar spacing was twice that in gamma-austenite. This study offers a useful approach to detect CSRO in other high-Mn steels.
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