Stacking fault aggregation during cooling composing FCC–HCP martensitic transformation revealed by in-situ electron channeling contrast imaging in an Fe-high Mn alloy
Source abstract
Abstract
To understand the mechanism of FCC-HCP martensitic transformation, we applied electron channeling contrast imaging under cooling to -51°C and subsequent heating to 150°C. The stacking faults were randomly extended and aggregated during cooling. The stacking fault aggregates were indexed as HCP. Furthermore, the shrink of stacking faults due to reverse motion of Shockley partials was observed during heating, but some SFs remained even after heating to the finishing temperature for reverse transformation (Af: 104°C). This fact implies that the chemical driving force of the FCC/HCP phases does not contribute to the motion of a single SF but works for group motion of stacking faults.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Metal Alloys Wear and Properties · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Materials Research, Tohoku University, Sendai, Miyagi, Japan
Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University, Kyoto, Japan
Faculty of Engineering, Kyushu University, Fukuoka, Japan
Research Center for Structural Materials, National Institute for Materials Science, Tsukuba, Japan
Funding
JSPS KAKENHI · Elements Strategy Initiative for Structural Materials
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