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- Title
Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel.
- Authors
Dabah, Eitan; Pfretzschner, Beate; Schaupp, Thomas; Kardjilov, Nikolay; Manke, Ingo; Boin, Mirko; Woracek, Robin; Griesche, Axel
- Abstract
Neutron Bragg-edge imaging was applied for the visualization of a γ-austenite to α′-martensite phase transformation. In the present study, a super martensitic stainless steel sample was heated until complete austenitization and was subsequently cooled down to room temperature. The martensitic phase transformation started at M = 190 °C. Using a monochromatic neutron beam with λ = 0.390 nm, the transmitted intensity was significantly reduced during cooling below M , since the emerging martensitic phase has a higher attenuation coefficient than the austenitic phase at this wavelength. The phase transformation process was visualized by filming the transmission images from a scintillator screen with a CCD camera with a temporal resolution of 30 s and a spatial resolution of 100 µm.
- Subjects
NEUTRON radiography; MARTENSITIC transformations; PHASE transitions; MARTENSITIC stainless steel; AUSTENITE
- Publication
Journal of Materials Science, 2017, Vol 52, Issue 6, p3490
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-016-0642-9