Journal
JOURNAL OF MICROSCOPY
Volume 262, Issue 1, Pages 123-127Publisher
WILEY-BLACKWELL
DOI: 10.1111/jmi.12352
Keywords
HRTEM; precipitation; STEM; 9R structure; 3R structure
Categories
Funding
- National Natural Science Foundation of China [51271111]
- Graduate Research and Innovation Special Projects of Shanghai University of Engineering Science [15KY0501, 14KY0515]
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Precipitates and solute enrich in aged ferritic steel containing copper were examined using high-resolution electron microscopy, high-angle annular dark-field scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. Two ledges with one-atom and two-atom layers height in the 9R/3R interface were observed. The enrichment of copper into two successive closed-packed planes with an interval of Fe-rich close-packed plane was detected. The passage of the Shockley partial, or the shearing, changes the stacking sequence of closed-packed planes. Finally, 9R Cu variant transformed into 3R Cu variant.
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