Irradiation damage in commercial purity magnesium

被引:9
作者
Khan, A. K. [1 ]
Yao, Z. [1 ]
Daymond, M. R. [1 ]
Holt, R. A. [1 ]
机构
[1] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada
关键词
Irradiation; Magnesium; Dislocations; TEM; DISLOCATION LOOPS; HCP METALS; ZIRCONIUM; MICROSTRUCTURE; EVOLUTION; HVEM; ZR;
D O I
10.1016/j.nimb.2011.01.072
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In-situ electron irradiation damage within the transmission electron microscope has been studied and compared with ion irradiation on commercial purity magnesium. Magnesium has the same crystal structure (hcp) and a similar c/a ratio to that of zirconium and is considered a suitable model system and useful analogue to zirconium (an important structural material for nuclear reactors). The results presented in this paper suggest that microstructure developed during irradiation is modified by the nature of the irradiating particles. The basal plane dislocation loops with Burgers vector 1/6(20 (2) over bar3) are formed by electron irradiation and analysis showed that all of these dislocation loops are interstitial in nature. Vacancy type prism plane dislocation loops with Burgers vector 1/3(11 (2) over bar0) also form but to a lesser degree than the basal plane dislocation loops. Ion irradiation for a dose up to 0.1 dpa produces a majority of interstitial type prism plane dislocation loops with Burgers vector 1/3(11 (2) over bar0). Void formation also takes place in ion irradiated samples subjected to a higher dose of 0.7 dpa. (C) 2011 Elsevier B.V. All rights reserved.
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页码:231 / 235
页数:5
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