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- Title
In situ 3D crystallographic characterization of deformation-induced martensitic transformation in a metastable Fe–Cr–Ni austenitic alloy by X-ray microtomography.
- Authors
Takakuwa, Osamu; Iwano, Tatsuya; Hirayama, Kyosuke; Toda, Hiroyuki; Takeuchi, Akihisa; Uesugi, Masayuki
- Abstract
Excellent strength–ductility balance in metastable Fe–Cr–Ni austenitic alloys stems from phase transformation from austenite (fcc structure) to αʹ martensite (bcc structure) during deformation, namely deformation-induced αʹ martensitic transformation (DIMT). Here, DIMT in a metastable Fe–17Cr–7Ni austenitic alloy was detected in situ and characterized in three dimensions (3D) by employing synchrotron radiation X-ray microtomography. This technique utilizes refraction contrast, which is attributable to the presence of phase boundaries between the parent austenite and the newly formed αʹ martensite phase. By combining microtomography and position-sensitive X-ray diffraction, we succeeded in crystallographically identifying multiple αʹ martensite phases continuously transformed in four groups from a single parent austenitic phase.
- Subjects
X-ray computed microtomography; MARTENSITIC transformations; FACE centered cubic structure; ALLOYS; BODY centered cubic structure
- Publication
Scientific Reports, 2024, Vol 14, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-024-65505-3