Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel

Eitan Dabah; Beate Pfretzschner; Thomas Schaupp; Nikolay Kardjilov; Ingo Manke; Mirko Boin; Robin Woracek; Axel Griesche

doi:10.1007/s10853-016-0642-9

Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel

Eitan Dabah, Beate Pfretzschner, Thomas Schaupp, Nikolay Kardjilov, Ingo Manke, Mirko Boin, Robin Woracek, Axel Griesche

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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_s = 190 °C. Using a monochromatic neutron beam with λ = 0.390 nm, the transmitted intensity was significantly reduced during cooling below M_s, 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.

Original language	English
Pages (from-to)	3490-3496
Number of pages	7
Journal	Journal of Materials Science
Volume	52
Issue number	6
DOIs	https://doi.org/10.1007/s10853-016-0642-9
State	Published - 1 Mar 2017
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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title = "Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel",

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 Ms = 190 °C. Using a monochromatic neutron beam with λ = 0.390 nm, the transmitted intensity was significantly reduced during cooling below Ms, 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.",

author = "Eitan Dabah and Beate Pfretzschner and Thomas Schaupp and Nikolay Kardjilov and Ingo Manke and Mirko Boin and Robin Woracek and Axel Griesche",

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T1 - Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel

AU - Dabah, Eitan

AU - Pfretzschner, Beate

AU - Schaupp, Thomas

AU - Kardjilov, Nikolay

AU - Manke, Ingo

AU - Boin, Mirko

AU - Woracek, Robin

AU - Griesche, Axel

PY - 2017/3/1

Y1 - 2017/3/1

N2 - 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 Ms = 190 °C. Using a monochromatic neutron beam with λ = 0.390 nm, the transmitted intensity was significantly reduced during cooling below Ms, 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.

AB - 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 Ms = 190 °C. Using a monochromatic neutron beam with λ = 0.390 nm, the transmitted intensity was significantly reduced during cooling below Ms, 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.

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Time-resolved Bragg-edge neutron radiography for observing martensitic phase transformation from austenitized super martensitic steel

Abstract

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