Multi-scale analyses of constituent phases in a trip-assisted duplex stainless steel by electron backscatter diffraction, in situ neutron diffraction, and energy selective neutron imaging

SCRIPTA MATERIALIA

卷:158

Article

Woo, Wanchuck¹  Kim, Jongyul¹  Kim, Eun-Young²  Choi, Shi-Hoon²  Em, Vyacheslav³  Hussey, Daniel S.⁴ 

[1] Korea Atom Energy Res Inst, Neutron Sci Ctr, Daejeon 34057, South Korea

[2] Sunchon Natl Univ, Dept Printed Elect Engn, Sunchon 57922, South Korea

[3] NRC Kurchatov Inst, Neutron Res Dept, Moscow, Russia

[4] NIST, Phys Measurement Lab, Gaithersburg, MD 20899 USA

关键词: Volume fractions;    Trip-assisted duplex stainless steel;    Electron backscatter diffraction;    In situ neutron diffraction;    Energy selective neutron imaging;   

DOI  :  10.1016/j.scriptamat.2018.08.040

来源: Elsevier

【 摘 要 】

Micrometer to centimeter scale analyses of the crystalline phase volume fractions in a trip-assisted duplex stainless steel were performed under loading using electron backscatter diffraction (EBSD), in situ neutron diffraction, and energy selective neutron imaging (ESNI) methods. In contrast to the localized investigations of EBSD, ESNI provides macroscopic spatial distributions in a volume-averaged manner over the entire specimen with a spatial resolution of about 65 pm. The ESNI shows that the martensite is concentrated on the necking region and estimates its volume fraction of 14% at a strain of 0.2, which is comparable to the neutron diffraction result. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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