In situ transmission electron microscopy study of growth of dislocation loops in Fe-Ni alloy under ion irradiation

被引：14

作者：

Chen, Liang ^{[1
]}

Murakami, Kenta ^{[2
]}

Chen, Dongyue ^{[1
]}

Abe, Hiroaki ^{[1
]}

Li, Zhengcao ^{[3
]}

Sekimura, Naoto ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Dept Nucl Engn & Management, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[2] Nagaoka Univ Technol, Inst GIGAKU, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan

[3] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

SCRIPTA MATERIALIA | 2020年 / 187卷

基金：

中国国家自然科学基金;

关键词：

Irradiation embrittlement; Defects; Transmission electron microscopy; Iron alloys; Reactor pressure vessel; RADIATION-DAMAGE; PURE IRON; MOBILITY; EVOLUTION;

D O I：

10.1016/j.scriptamat.2020.06.071

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In situ irradiation in transmission electron microscope following pre-irradiation was performed on Fe-0.6Ni alloy to investigate the growth of dislocation loops under irradiation. The observations showed two types of loop growth behaviour. One type was almost linear growth with irradiation dose, possibly caused by loop absorbing freely migrating defects. The other was abrupt growth with rapid increase in diameter. It was found that nanometre-sized loop might migrate one-dimensionally, following which the large loop could absorb the small loop. This process can result in the abrupt growth of loop and broadening of loop size distribution. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：453 / 457

页数：5

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