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

ABSTRACT: 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.

SUBMITTER: Tsuzazki K

PROVIDER: S-EPMC7989056 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature

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

Tsuzazki Kaneaki K Koyama Motomichi M Sasaki Ryosuke R Nakafuji Keiichiro K Oie Kazushi K Shibata Akinobu A Gondo Takashi T Miyazaki Hiroya H Akamine Hiroshi H Nishida Minoru M

Microscopy (Oxford, England) 20210301 2

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 crystallograp ...[more]

PMID: 32901813

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