Correlation of in-situ transmission electron microscopy and microchemistry analysis of radiation-induced precipitation and segregation in ion irradiated advanced ferritic/martensitic steels

SCRIPTA MATERIALIA

卷:162

Article

Zheng, Ce¹  Ke, Jia-Hong^2,4  Maloy, Stuart A.³  Kaoumi, Djamel¹ 

[1] North Carolina State Univ, Dept Nucl Engn, 3140 Burlington Engn Labs,Room 2137, Raleigh, NC 27695 USA

[2] Univ Wisconsin, Dept Mat Sci & Engn, 1509 Univ Ave, Madison, WI 53706 USA

[3] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM USA

[4] Oregon State Univ, Dept Mech Ind & Mfg Engn, Corvallis, OR 97331 USA

关键词: Ferritic/martensitic steels;    Ion irradiation;    In-situ transmission electron microscopy;    Energy dispersive X-ray spectroscopy;    Precipitation;   

DOI  :  10.1016/j.scriptamat.2018.12.018

来源: Elsevier

【 摘 要 】

This article presents a novel method combining ion irradiation, in-situ transmission electron microscopy (TEM), and microchemistry analysis before/after irradiation, which allows to examine same microstructural areas throughout ion irradiation. A 12 wt% Cr Ferritic/Martensitic steel (HT9) was irradiated in the TEM to 1.17 x 10(20) ions.m(-2) at 440 degrees C using 1 MeV Kr2+ ions, and the in-situ characterization focused on radiation-induced precipitation and segregation. Results of in-situ experiments were compared with those obtained from ex-situ experiments, to showcase how this method helps to better understand precipitation kinetics in the irradiated material examined ex-situ, for which only snapshots are available at limited doses. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

Free