Novel −75°C SEM cooling stage: application for martensitic transformation in steel

Microstructural changes during the martensitic transformation from face-centred cubic (FCC) to body-centred cubic (BCC) in an Fe-31Ni alloy were observed by scanning electron microscopy (SEM) with a newly developed Peltier stage available at temperatures to  −75°C. Electron channelling contrast imag...

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Detalles Bibliográficos
Autores principales: Tsuzazki, Kaneaki, Koyama, Motomichi, Sasaki, Ryosuke, Nakafuji, Keiichiro, Oie, Kazushi, Shibata, Akinobu, Gondo, Takashi, Miyazaki, Hiroya, Akamine, Hiroshi, Nishida, Minoru
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Technical Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7989056/
https://www.ncbi.nlm.nih.gov/pubmed/32901813
http://dx.doi.org/10.1093/jmicro/dfaa051
Descripción
Sumario:Microstructural changes during the martensitic transformation from face-centred cubic (FCC) to body-centred cubic (BCC) in an Fe-31Ni alloy were observed by scanning electron microscopy (SEM) with a newly developed Peltier stage available at temperatures to  −75°C. Electron channelling contrast imaging (ECCI) was utilized for the in situ observation during cooling. Electron backscatter diffraction analysis at ambient temperature (20°C) after the transformation was performed for the crystallographic characterization. A uniform dislocation slip in the FCC matrix associated with the transformation was detected at −57°C. Gradual growth of a BCC martensite was recognized upon cooling from −57°C to −63°C.

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