期刊
JOURNAL OF NUCLEAR MATERIALS
卷 511, 期 -, 页码 487-495出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2018.09.021
关键词
Irradiation; Micropillar compression; Zr alloys; Irradiation hardening; Dislocations
资金
- NSERC
- UNENE
- COG under the Industrial Research Chair program in Nuclear Materials at Queen's University
In this paper, 40 MeV Zr ion irradiation of Zr-2.5Nb pressure tube alloy was carried out, delivering a damage layer 6.5 mu m deep. Uniaxial micropillar compression experiments along the tube axial (AD) and transverse directions (TD) were conducted. Irradiation was found to alter the deformation mechanisms and to increase the yield strength more in the AD oriented pillars than TD pillars for irradiation up to 0.6 dpa. This anisotropy in response is discussed in terms of the limitations of the micropillar compression method and the different deformation mechanisms which are activated in each orientation. The anisotropic hardening effect of -type dislocation loops on prismatic , basal , and pyramidal slip systems is also discussed. The micropillar compression results were also compared with nanoindentation results conducted on the same material. (C) 2018 Elsevier B.V. All rights reserved.
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