Journals Information
Universal Journal of Materials Science Vol. 2(2), pp. 19 - 26
DOI: 10.13189/ujms.2014.020201
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Rhenium Effect in Irradiated Mo-Re Alloys and Welds
Alexander Krajnikov 1,*, Fumio Morito 2, Mykola Danylenko 1
1 Frantsevich Institute for Problems of Materials Science, Krzhizhanovsky St. 3, Kyiv, 03680, Ukraine
2 MSF Laboratory, 4-20-12, Keyakidai, Moriya, 302-0128, Japan
ABSTRACT
The mechanical properties and microstructure of Mo-Re alloys and welds were examined after low- and high-temperature irradiation focusing on the effects of Re concentration, phase stability, microstructural changes and impurity redistribution. Ductility improvement and fracture mode changes from intergranular to transgranular are clearly observed in Mo-Re alloys with an increase in Re content. Neutron irradiation causes hardening of the matrix and concurrently reduces its ductility. The hardening effect is rather limited and unstable after low-temperature irradiation because of the lack of ductility. The damaging effect of neutrons is smaller and hardening of the matrix is more pronounced after high-temperature irradiation. Intensification of homogeneous nucleation of Re-rich phases throughout the bulk is observed after high-temperature irradiation in all of the Mo-Re alloys studied. As a result, the microstructure and strength of all parts of as-irradiated welds equalize and show approximately the same level of strength.
KEYWORDS
Mo-Re Welds, Re-Effect, Tensile Properties, Neutron Irradiation, Radiation-Induced Hardening, Phase Transformations
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Alexander Krajnikov , Fumio Morito , Mykola Danylenko , "Rhenium Effect in Irradiated Mo-Re Alloys and Welds," Universal Journal of Materials Science, Vol. 2, No. 2, pp. 19 - 26, 2014. DOI: 10.13189/ujms.2014.020201.
(b). APA Format:
Alexander Krajnikov , Fumio Morito , Mykola Danylenko (2014). Rhenium Effect in Irradiated Mo-Re Alloys and Welds. Universal Journal of Materials Science, 2(2), 19 - 26. DOI: 10.13189/ujms.2014.020201.