Radiation resistance of oxide dispersion strengthened alloys: Perspectives from in situ observations and rate theory calculations

SCRIPTA MATERIALIA

卷:148

Article

Liu, Xiang¹  Miao, Yinbin²  Li, Meimei²  Kirk, Marquis A.²  Zhang, Guangming³  Ukai, Shigeharu⁴  Maloy, Stuart A.⁵  Stubbins, James F.^1,6 

[1] Univ Illinois, Dept Nucl Plasma & Radiol Engn, Urbana, IL 61801 USA

[2] Argonne Natl Lab, Nucl Engn Div, Lemont, IL 60439 USA

[3] Qingdao Univ Technol, Qingdao 266033, Shandong, Peoples R China

[4] Hokkaido Univ, Fac Engn, Mat Sci & Engn, Kita Ku, N13,W-8, Sapporo, Hokkaido 0608628, Japan

[5] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA

[6] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

关键词: Oxide dispersion strengthened (ODS) alloy;    Dislocation structure;    Microstructure;    Transmission electron microscopy;    Radiation enhanced diffusion (RED);   

DOI  :  10.1016/j.scriptamat.2018.01.018

来源: Elsevier

【 摘 要 】

Here, in situ ion irradiation and rate theory calculations were employed to directly compare the radiation resistance of an oxide dispersion strengthened alloy with that of a conventional ferritic/martensitic alloy. Compared to the rapid buildup of dislocation loops, loop growth, and formation of network dislocations in the conventional ferritic/martensitic alloy, the superior radiation resistance of the oxide dispersion strengthened alloy is manifested by its stable dislocation structure under the same irradiation conditions. The results are consistent with rate theory calculations, which show that high-density nanoparticles can significantly reduce freely migrating defects and suppress the buildup of clustered defects. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free