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Kim, Ju-Young
Robust Multifunctional Materials Lab
Research Interests
  • Flexible / stretchable devices, nano-mechanics, nanoporous metal, materials reliability

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Martensitic phase transformation and pop-in in compression of austenitic steel nanoplates observed in situ by transmission electron microscopy

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Title
Martensitic phase transformation and pop-in in compression of austenitic steel nanoplates observed in situ by transmission electron microscopy
Author
Kim, Yong-JaeYoo, Byung-GilChoi, In-ChulSeok, Moo-YoungKim, Ju-YoungOhmura, TakahitoJang, Jae-il
Keywords
Diffraction modes; Imaging modes; In-situ; In-situ compression; In-situ TEM; Martensitic phase transformations; Microstructural changes; Nano scale; Nano-Plate; Nanoplates; Pop-in; Shearing-off; Slip band; Transmission electron microscope
Issue Date
201205
Publisher
ELSEVIER SCIENCE BV
Citation
MATERIALS LETTERS, v.75, no., pp.107 - 110
Abstract
To explore small-scale martensitic phase transformation and its relation to pop-ins observed in stress-strain curve, in situ compression experiments in transmission electron microscope were performed on austenitic steel nanoplates. Diffraction mode test revealed that the transformation indeed occurs at the nanoscale, but the pop-in seems not related with sudden microstructural change. Additional imaging mode test suggests that pop-ins may be caused by rapid formation of slip band and/or shearing-off of the nanoplate.
URI
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DOI
http://dx.doi.org/10.1016/j.matlet.2012.02.014
ISSN
0167-577X
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