期刊
MATERIALS RESEARCH LETTERS
卷 7, 期 7, 页码 290-297出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2019.1604442
关键词
Additive manufacturing; 316 austenitic stainless steels; cellular structures; in situ radiation; radiation damages
资金
- DOE-Nuclear Energy [DE-NE0008549]
- NSF [NSF-DMR 1611380]
- Office of Naval Research [N00014-16-1-2778]
- US Department of Energy [DE-AC52-07NA27344]
- DOE [DE-NE0008787]
In-core or cladding structural materials exposed to heavy ion irradiation often suffer serious irradiation-induced damages. Introducing defect sinks can effectively mitigate irradiation-induced degradation in materials. Here, we investigated the radiation response of additively manufactured 316 austenitic stainless steel with high-density solidification cellular structures via in situ Kr++ irradiation at 400 degrees C to 5dpa. The study shows that the cellular wallswith trapped dislocations can serve as effective defect sinks, thus reduce dislocation loop density compared with the conventional coarse-grained counterparts. This study provides a positive step for the potential applications of radiation-resistant, additively manufactured steels in advanced nuclear reactors. [GRAPHICS] IMPACT STATEMENT The solidification cellular walls with trapped dislocations in additively manufactured 316 SS can serve as effective defect sinks that prominently reduce irradiation-induced defect density compared with the conventional coarse-grained counterparts.
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