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Microstructure of perfect nitrogen-expanded austenite formed by unconstrained nitriding.
- Source :
-
Scripta Materialia . Mar2021, Vol. 194, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- In present work, a perfect nitrogen-expanded austenite free from the deformation defect is prepared by the plasma-based low-energy nitrogen ion implanted (also named plasma source ion nitriding) TEM foil of Fe-Cr-Ni austenitic alloys under an unconstrained condition. The effective area in nano-scale, which is constructed by the perfect nitrogen-expanded austenite without stress and plastic strain, is obtained for TEM observation. The electron diffraction directly proves that the Fe 4 N-like long-rang ordered transformation is the nature of nitrogen-expanded austenite only dependent on nitrogen concentration, and independent on stress or defect. Moreover, the intrinsic microstructure of the nitrogen-expanded austenite is confirmed without twins and ε-martensite, which were formed from the constrained deformation of the nitrided layer depending on the stacking fault energy. Image, graphical abstract [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 194
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 148165408
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2020.113705