Comparison of irradiation hardening and microstructure evolution in ion-irradiated delta and epsilon hydrides

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• 作者：Naoko Oono ; Ryuta Kasada ; Toru Higuchi ; Kan Sakamoto ; Masafumi Nakatsuka ; Akiko Hasegawa ; Sosuke Kondo ; Noriyuki Y. Iwata ; Hideki Matsui ; Akihiko Kimura
• 刊名：Journal of Nuclear Materials
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：442
• 期：1-3_supp_S1
• 页码：S826-S829
• 全文大小：1496 K

文摘

A ¦Ä-Zr-hydride was irradiated with 6.4 MeV Fe³⁺ ions to clarify the relationship between hardening and microstructural changes of bulk Zr-hydrides under neutron irradiation. Irradiation hardening was measured by nanoindentation tests. Transmission electron microscope cross-sectional observations showed that the deformation mechanism of the ¦Ä-Zr-hydride was both slip and twinning. Dislocation loops were observed in the irradiated hydride matrix. These irradiation-induced defects make slip deformation difficult and consequently promote the twin deformation of ¦Ä-Zr-hydride. This work is a continuation of the previous our work (J. Nucl. Mater. 419 (2011) 366-370) focused upon ¦Å-Zr-hydride and we discuss a comparison between the two Zr-hydrides.